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146-647: The Anclote Missile Tracking Annex was a Cold War radar station of 49.65 acres (20.09 ha) in Pasco County, Florida adjacent to the Alachua Pinellas community at the mouth of the Anclote River near Tampa . The Air Force Systems Command military installation , site D 3 of the Eglin Range Complex , was used for development tests, e.g., 1950s/1960s Regulus II supersonic cruise missile firings from

292-471: A command economy and installed similarly communist regimes its in satellites. United States involvement in regime change during the Cold War included support for anti-communist and right-wing dictatorships , governments, and uprisings across the world, while Soviet involvement in regime change included the funding of left-wing parties , wars of independence , revolutions and dictatorships. As nearly all

438-516: A credible minimum deterrence . Commodore Tim Hare , former Director of Nuclear Policy at the British Ministry of Defence , has described "sub-strategic use" as offering the Government "an extra option in the escalatory process before it goes for an all-out strategic strike which would deliver unacceptable damage". However, this sub-strategic capacity has been criticized as potentially increasing

584-608: A détente . In 1979, the toppling of pro-US governments in Iran and Nicaragua and a Soviet invasion of Afghanistan again raised fears of war. In 1985, Mikhail Gorbachev rose to leader of the USSR and expanded political freedoms in his country, which led to the fall of the communist regimes of the Eastern Bloc in 1989 and the collapse of the Soviet Union in 1991. The Western Bloc included

730-423: A 50 m/s wind, which is comparable to tornadoes. Each bomber carried 6 tons of bombs. A total of 381,300 bombs, which amount to 1,783 tons of bombs, were used in the bombing. Within a few hours of the raid, it had killed an estimated 100,000 people and destroyed 41 km (16 sq mi) of the city and 267,000 buildings in a single night — the deadliest bombing raid in military aviation history other than

876-767: A German rebuilding effort set forth by western European countries in 1948, the US, Britain and France spearheaded the establishment of the Federal Republic of Germany from the three Western zones of occupation in April 1949. The Soviet Union proclaimed its zone of occupation in Germany the German Democratic Republic that October. Media in the Eastern Bloc was an organ of the state , completely reliant on and subservient to

1022-485: A culture where use of these weapons is more acceptable and therefore is increasing the risk of war, as these modern weapons do not possess the same psychological deterrent value as the large Cold-War era, multi-megaton warheads. In many ways, this present change in the balance of terror can be seen as the complete embracement of the switch from the 1950s Eisenhower doctrine of " massive retaliation " to one of " flexible response ", which has been growing in importance in

1168-515: A full-scale nuclear war could potentially bring about the human extinction , or at least its near extinction, with only a relatively small number of survivors (mainly in remote areas) and a reduced quality of life and life expectancy for centuries afterward. However, such predictions, assuming total war with nuclear arsenals at Cold War highs, have not been without criticism. Such a horrific catastrophe as global nuclear warfare would almost certainly cause permanent damage to most complex life on

1314-417: A full-scale nuclear war. Others have called limited nuclear war "global nuclear holocaust in slow motion", arguing that—once such a war took place—others would be sure to follow over a period of decades, effectively rendering the planet uninhabitable in the same way that a "full-scale nuclear war" between superpowers would, only taking a much longer (and arguably more agonizing) path to the same result. Even

1460-752: A horrendous casualty rate, especially since over 400,000 American combatants had already died fighting in both the European and the Pacific theaters of the war. On July 26, 1945, the United States, the United Kingdom , and the Republic of China issued a Potsdam Declaration that called for the unconditional surrender of Japan. It stated that if Japan did not surrender, it would face "prompt and utter destruction". The Japanese government ignored this ultimatum, sending

1606-451: A large area using conventional explosives, called dirty bombs . The detonation of a "dirty bomb" would not cause a nuclear explosion, nor would it release enough radiation to kill or injure a large number of people. However, it could cause severe disruption and require potentially very costly decontamination procedures and increased spending on security measures. Radioactive materials can also be used for targeted assassinations. For example,

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1752-458: A large-scale, "combined nuclear and conventional" war. In accordance with their doctrine, the Soviet Union conducted large-scale military exercises to explore the possibility of defensive and offensive warfare during a nuclear war . The exercise, under the code name of " Snowball ", involved the detonation of a nuclear bomb about twice as powerful as that which fell on Nagasaki and an army of approximately 45,000 soldiers on maneuvers through

1898-461: A limited number of missiles against an adversary as a means of conveying a political message, warning or demonstration of resolve". It is believed that all current nuclear weapons states possess tactical nuclear weapons, with the exception of the United Kingdom , which decommissioned its tactical warheads in 1998. However, the UK does possess scalable-yield strategic warheads, and this technology tends to blur

2044-455: A major propaganda effort began in 1949 was Radio Free Europe/Radio Liberty , dedicated to bringing about the peaceful demise of the communist system in the Eastern Bloc. Radio Free Europe attempted to achieve these goals by serving as a surrogate home radio station, an alternative to the controlled and party-dominated domestic press in the Soviet Bloc. Radio Free Europe was a product of some of

2190-428: A message that they were not going to surrender. In response to the rejection, President Truman authorized the dropping of the atomic bombs. At the time of its use, there were only two atomic bombs available, and despite the fact that more were in production back in mainland U.S. , the third bomb wouldn't be available for combat until September. On August 6, 1945, the uranium-type nuclear weapon codenamed " Little Boy "

2336-626: A neutral Germany to prevent West Germany's incorporation into NATO, but his attempts were cut short after he was executed several months later during a Soviet power struggle. The events led to the establishment of the Bundeswehr , the West German military, in 1955. In 1949, CCP Chairman Mao Zedong 's People's Liberation Army defeated Chiang Kai-shek 's United States-backed Kuomintang (KMT) Nationalist Government in China. The KMT-controlled territory

2482-655: A new war". On 6 September 1946, James F. Byrnes delivered a speech in Germany repudiating the Morgenthau Plan (a proposal to partition and de-industrialize post-war Germany) and warning the Soviets that the US intended to maintain a military presence in Europe indefinitely. As Byrnes stated a month later, "The nub of our program was to win the German people ... it was a battle between us and Russia over minds ..." In December,

2628-421: A nuclear attack. Indeed, it became generally believed that the threat of nuclear war would deter any strike against the United States. Many proposals were suggested to put all American nuclear weapons under international control (by the newly formed United Nations , for example) as an effort to deter both their usage and a nuclear arms race . However, no terms could be arrived at that would be agreed upon by both

2774-434: A nuclear war. Therefore, they expected a large-scale nuclear exchange, followed by a "conventional war" which itself would involve heavy use of tactical nuclear weapons . American doctrine rather assumed that Soviet doctrine was similar, with the mutual in mutually assured destruction necessarily requiring that the other side see things in much the same way, rather than believing—as the Soviets did—that they could fight

2920-572: A plan envisioning an economically self-sufficient Germany, including a detailed accounting of the industrial plants, goods and infrastructure already taken by the Soviets. In June 1947, in accordance with the Truman Doctrine , the United States enacted the Marshall Plan , a pledge of economic assistance for all European countries willing to participate, including the Soviet Union. Under the plan, which President Harry S. Truman signed on 3 April 1948,

3066-470: A program to update the bomber fleet to one that was all-jet. During the early 1950s the B-47 Stratojet and B-52 Stratofortress were introduced, providing the ability to bomb the Soviet Union more easily. Before the development of a capable strategic missile force in the Soviet Union, much of the war-fighting doctrine held by western nations revolved around using a large number of smaller nuclear weapons in

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3212-602: A qualitative advantage over the Soviet numerical supremacy in conventional weapons. Several scares about the increasing ability of the Soviet Union's strategic bomber forces surfaced during the 1950s. The defensive response by the United States was to deploy a fairly strong "layered defense" consisting of interceptor aircraft and anti-aircraft missiles , like the Nike , and guns, like the M51 Skysweeper , near larger cities. However, this

3358-613: A secret 1950 document, the National Security Council proposed reinforcing pro-Western alliance systems and quadrupling spending on defense. Truman, under the influence of advisor Paul Nitze , saw containment as implying complete rollback of Soviet influence in all its forms. United States officials moved to expand this version of containment into Asia , Africa , and Latin America , in order to counter revolutionary nationalist movements, often led by communist parties financed by

3504-595: A small number of nuclear weapons against strictly military targets could be escalated through increasing the number of weapons used, or escalated through the selection of different targets. Limited attacks are thought to be a more credible response against attacks that do not justify all-out retaliation, such as an enemy's limited use of nuclear weapons. The second, a full-scale nuclear war , could consist of large numbers of nuclear weapons used in an attack aimed at an entire country, including military, economic, and civilian targets. Such an attack would almost certainly destroy

3650-477: A source of intelligence. During the late 1970s and 1980s, the KGB perfected its use of espionage to sway and distort diplomacy. Active measures were "clandestine operations designed to further Soviet foreign policy goals," consisting of disinformation, forgeries, leaks to foreign media, and the channeling of aid to militant groups. Retired KGB Major General Oleg Kalugin , former head of Foreign Counter Intelligence for

3796-494: A tactical role. It is debatable whether such use could be considered "limited" however because it was believed that the United States would use its own strategic weapons (mainly bombers at the time) should the Soviet Union deploy any kind of nuclear weapon against civilian targets. Douglas MacArthur , an American general, was fired by President Harry Truman , partially because he persistently requested permission to use his own discretion in deciding whether to utilize atomic weapons on

3942-530: A unified and neutral Germany was undesirable, with Walter Bedell Smith telling General Eisenhower "in spite of our announced position, we really do not want nor intend to accept German unification on any terms that the Russians might agree to, even though they seem to meet most of our requirements." Shortly thereafter, Stalin instituted the Berlin Blockade (June 1948 – May 1949), one of the first major crises of

4088-476: A warhead to a target, a missile was much faster and more cost-effective than a bomber, and enjoyed a higher survivability due to the enormous difficulty of interception of the ICBMs (due to their high altitude and extreme speed). The Soviet Union could now afford to achieve nuclear parity with the United States in raw numbers, although for a time, they appeared to have chosen not to. Photos of Soviet missile sites set off

4234-431: Is a largely unknown and understudied factor in nuclear deterrence thinking, as states possessing nuclear weapons are susceptible to retaliation in kind, while sub- or trans-state actors may be less so. The collapse of the Soviet Union has given rise to the possibility that former Soviet nuclear weapons might become available on the black market (so-called 'loose nukes'). A number of other concerns have been expressed about

4380-668: Is considered to have resurged after the Russian invasion of Ukraine , particularly with regard to Russian threats to use nuclear weapons during the invasion . Since 1947, the Doomsday Clock of the Bulletin of the Atomic Scientists has visualized how close the world is to a nuclear war. The Doomsday Clock reached high points in 1953, when the Clock was set to two minutes until midnight after

4526-445: Is known to have constructed the reactor and reprocessing plant necessary for building nuclear weapons. South Africa also manufactured several complete nuclear weapons in the 1980s, but subsequently became the first country to voluntarily destroy their domestically made weapons stocks and abandon further production (1990s). Nuclear weapons have been detonated on over 2,000 occasions for testing purposes and demonstrations. After

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4672-504: The Baltic to Trieste in the Adriatic ". A week later, on 13 March, Stalin responded vigorously to the speech, saying Churchill could be compared to Adolf Hitler insofar as he advocated the racial superiority of English-speaking nations so that they could satisfy their hunger for world domination, and that such a declaration was "a call for war on the USSR." The Soviet leader also dismissed

4818-806: The Berlin Wall to prevent the citizens of East Berlin from fleeing to West Berlin , at the time part of United States-allied West Germany . Major crises of this phase included the Berlin Blockade of 1948–1949, the Chinese Communist Revolution of 1945–1949, the Korean War of 1950–1953, the Hungarian Revolution of 1956 and the Suez Crisis of that same year, the Berlin Crisis of 1961 ,

4964-551: The Cold War . As long as the strategic American nuclear forces could overwhelm their Soviet counterparts, a Soviet pre-emptive strike could be averted. Moreover, the Soviet Union could not afford to build any reasonable counterforce, as the economic output of the United States was far larger than that of the Soviets, and they would be unable to achieve "nuclear parity". Soviet nuclear doctrine, however, did not match American nuclear doctrine. Soviet military planners assumed they could win

5110-801: The Cuban Missile Crisis of 1962, and the Vietnam War of 1964–1975. Both superpowers competed for influence in Latin America and the Middle East , and the decolonising states of Africa , Asia , and Oceania . Following the Cuban Missile Crisis, this phase of the Cold War saw the Sino-Soviet split . Between China and the Soviet Union's complicated relations within the Communist sphere, leading to

5256-837: The Eastern Bloc . Cominform faced an embarrassing setback the following June, when the Tito–Stalin split obliged its members to expel Yugoslavia, which remained communist but adopted a non-aligned position and began accepting financial aid from the US. Besides Berlin, the status of the city of Trieste was at issue. Until the break between Tito and Stalin, the Western powers and the Eastern bloc faced each other uncompromisingly. In addition to capitalism and communism, Italians and Slovenes, monarchists and republicans as well as war winners and losers often faced each other irreconcilably. The neutral buffer state Free Territory of Trieste , founded in 1947 with

5402-503: The KGB and involved in its intelligence operations, adhered to Moscow's line, although dissent began to appear after 1956. Other critiques of the consensus policy came from anti-Vietnam War activists , the Campaign for Nuclear Disarmament , and the anti-nuclear movement . In early 1947, France, Britain and the United States unsuccessfully attempted to reach an agreement with the Soviet Union for

5548-506: The Kingdom of Greece in its civil war against Communist-led insurgents. In the same month, Stalin conducted the rigged 1947 Polish legislative election which constituted an open breach of the Yalta Agreement . The US government responded to this announcement by adopting a policy of containment , with the goal of stopping the spread of communism . Truman delivered a speech calling for

5694-560: The Manhattan project lead manager J. Robert Oppenheimer recalled: We knew the world would not be the same. A few people laughed, a few people cried, and most people were silent. I remembered the line from the Hindu scripture the Bhagavad Gita . Vishnu is trying to persuade the prince that he should do his duty and to impress him takes on his multiarmed form and says, "Now, I am become Death,

5840-678: The NATO military alliance in 1949 (which was matched by the Soviet-led Warsaw Pact in 1955). The Berlin Blockade took place, and Germany's occupation zones solidified into East and West Germany in 1949. The USSR tested its first nuclear weapon in August 1949, four years after the U.S.'s first test , thus starting an arms race. A major proxy war was the Korean War of 1950 to 1953, which ended in stalemate. The Cuban Revolution of 1959 installed

5986-551: The Pacific War and, therefore, World War II, as Germany had already signed its Instrument of Surrender on May 8, 1945, ending the war in Europe . The two atomic bombings led, in part, to post-war Japan's adopting of the Three Non-Nuclear Principles , which forbade the nation from developing nuclear armaments. After the successful Trinity nuclear test July 16, 1945, which was the very first nuclear detonation,

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6132-497: The People's Republic of China in 1951 during the Korean War . Mao Zedong , China's communist leader, gave the impression that he would welcome a nuclear war with the capitalists because it would annihilate what he viewed as their imperialist system. Let us imagine how many people would die if war breaks out. There are 2.7 billion people in the world, and a third could be lost. If it is a little higher it could be half ... I say that if

6278-556: The Sino-Soviet border conflict , while France, a Western Bloc state, began to demand greater autonomy of action. The Warsaw Pact invasion of Czechoslovakia occurred to suppress the Prague Spring of 1968, while the United States experienced internal turmoil from the civil rights movement and opposition to United States involvement in the Vietnam War . In the 1960s–1970s, an international peace movement took root among citizens around

6424-718: The Soviet boycott of the Allied Control Council and its incapacitation, an event marking the beginning of the full-blown Cold War and the end of its prelude, as well as ending any hopes at the time for a single German government and leading to formation in 1949 of the Federal Republic of Germany and German Democratic Republic . The twin policies of the Truman Doctrine and the Marshall Plan led to billions in economic and military aid for Western Europe, Greece, and Turkey. With

6570-544: The Turkish Straits crisis and Black Sea border disputes were also a major factor in increasing tensions. In September, the Soviet side produced the Novikov telegram, sent by the Soviet ambassador to the US but commissioned and "co-authored" by Vyacheslav Molotov ; it portrayed the US as being in the grip of monopoly capitalists who were building up military capability "to prepare the conditions for winning world supremacy in

6716-499: The United Nations Security Council Resolution 82 and 83 backed the defense of South Korea, although the Soviets were then boycotting meetings in protest of the fact that Taiwan (Republic of China), not the People's Republic of China , held a permanent seat on the council. A UN force of sixteen countries faced North Korea, although 40 percent of troops were South Korean, and about 50 percent were from

6862-480: The United States Navy (and their aircraft) deployed various such weapons as bombs, rockets (guided and unguided), torpedoes, and depth charges. Such tactical naval nuclear weapons were considered more acceptable to use early in a conflict because there would be few civilian casualties. It was feared by many planners that such use would probably quickly have escalated into a large-scale nuclear war. This situation

7008-595: The Venice missile launch complex . The Anclote site "phased down" May 1-July 1, 1969. 28°11′19.44″N 82°47′39.00″W  /  28.1887333°N 82.7941667°W  / 28.1887333; -82.7941667 Cold War The Cold War was a period of global geopolitical tension and struggle for ideological and economic influence between the United States and the Soviet Union (USSR) and their respective allies,

7154-496: The Western Bloc and the Eastern Bloc , that started in 1947, two years after the end of World War II , and lasted until the fall of the Soviet Union in 1991. The term cold war is used because there was no direct fighting between the two superpowers , though each supported opposing sides in major regional conflicts known as proxy wars . Aside from the nuclear arms race starting in 1949 and conventional military deployment ,

7300-413: The dissolution of the Soviet Union in 1991 and the resultant end of the Cold War, the threat of a major nuclear war between the two nuclear superpowers was generally thought to have declined. Since then, concern over nuclear weapons has shifted to the prevention of localized nuclear conflicts resulting from nuclear proliferation , and the threat of nuclear terrorism . However, the threat of nuclear war

7446-475: The hypocenter immediately after the blast. The exercise was conducted on September 14, 1954, under command of Marshal Georgy Zhukov to the north of Totskoye village in Orenburg Oblast , Russia . A revolution in nuclear strategic thought occurred with the introduction of the intercontinental ballistic missile (ICBM), which the Soviet Union first successfully tested in August 1957. In order to deliver

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7592-459: The poisoning of Alexander Litvinenko was described by medical professionals, as "an ominous landmark: the beginning of an era of nuclear terrorism ." Alternatives to nuclear warfare include nuclear deterrence , nuclear disarmament and Treaty on the Non-Proliferation of Nuclear Weapons . During the final stages of World War II in 1945, the United States conducted atomic raids on

7738-406: The "acceptability" of using nuclear weapons. Combined with the trend in the reduction in the worldwide nuclear arsenal as of 2007 is the warhead miniaturization and modernization of the remaining strategic weapons that is presently occurring in all the declared nuclear weapon states, into more "usable" configurations. The Stockholm International Peace Research Institute suggests that this is creating

7884-559: The Cold War , though none resulted in the use of nuclear weapons. Many such scenarios have been depicted in popular culture , such as in the 1959 film On the Beach , the 1962 novel Fail-Safe , the 1964 film Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb , the 1983 film WarGames , and the 1984 film Threads . The above examples envisage nuclear warfare at a strategic level, i.e., total war . However, nuclear powers have

8030-414: The Cold War was in its essence a war of ideas. The United States, acting through the CIA, funded a long list of projects to counter the communist appeal among intellectuals in Europe and the developing world. The CIA also covertly sponsored a domestic propaganda campaign called Crusade for Freedom . The rearmament of West Germany was achieved in the early 1950s. Its main promoter was Konrad Adenauer ,

8176-404: The Cold War, preventing Western food, materials and supplies from arriving in the West Germany's exclave of West Berlin . The United States (primarily), Britain, France, Canada, Australia, New Zealand, and several other countries began the massive "Berlin airlift", supplying West Berlin with food and other provisions despite Soviet threats. The Soviets mounted a public relations campaign against

8322-408: The Communist governments militarily. The fall of the Iron Curtain after the Pan-European Picnic and the Revolutions of 1989 , which represented a peaceful revolutionary wave with the exception of the Romanian revolution and the Afghan Civil War (1989–1992) , overthrew almost all of the Marxist–Leninist regimes of the Eastern Bloc. The Communist Party of the Soviet Union itself lost control in

8468-408: The Japanese cities of Hiroshima and Nagasaki , the first on August 6, 1945, and the second on August 9, 1945. These two events were the only times nuclear weapons have been used in combat . For six months before the atomic bombings, the U.S. 20th Air Force under General Curtis LeMay executed low-level incendiary raids against Japanese cities . The most destructive air raid to occur during

8614-400: The KGB (1973–1979), described active measures as "the heart and soul of Soviet intelligence ." During the Sino-Soviet split , "spy wars" also occurred between the USSR and PRC. In September 1947, the Soviets created Cominform to impose orthodoxy within the international communist movement and tighten political control over Soviet satellites through coordination of communist parties in

8760-428: The Marshall Plan, seeing it as an effort by the US to impose its influence on Europe. In response, the Soviet Union established Comecon (Council for Mutual Economic Assistance) to foster economic cooperation among communist states. The United States and its Western European allies sought to strengthen their bonds and used the policy of containment against Soviet influence; they accomplished this most notably through

8906-446: The Russian Civil War further complicated relations, and although the Soviet Union later allied with Western powers to defeat Nazi Germany , this cooperation was strained by mutual suspicions. In the immediate aftermath of World War II, disagreements about the future of Europe, particularly Eastern Europe , became central. The Soviet Union's establishment of communist regimes in the countries it had liberated from Nazi control—enforced by

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9052-432: The Russian invasion of Ukraine. Nuclear warfare scenarios are usually divided into two groups, each with different effects and potentially fought with different types of nuclear armaments. The first, a limited nuclear war (sometimes attack or exchange ), refers to the controlled use of nuclear weapons, whereby the implicit threat exists that a nation can still escalate their use of nuclear weapons. For example, using

9198-404: The Soviet Union and the United States came in a speech by Bernard Baruch , an influential advisor to Democratic presidents, on 16 April 1947. The speech, written by journalist Herbert Bayard Swope , proclaimed, "Let us not be deceived: we are today in the midst of a cold war." Newspaper columnist Walter Lippmann gave the term wide currency with his book The Cold War . When asked in 1947 about

9344-404: The Soviet Union pursued its own atomic capabilities through a combination of scientific research and espionage directed against the American program. The Soviets believed that the Americans, with their limited nuclear arsenal, were unlikely to engage in any new world wars, while the Americans were not confident they could prevent a Soviet takeover of Europe, despite their atomic advantage. Within

9490-408: The Soviet Union was used to monitor dissent from official Soviet politics and morals. Although to an extent disinformation had always existed, the term itself was invented, and the strategy formalized by a black propaganda department of the Soviet KGB. Based on the amount of top-secret Cold War archival information that has been released, historian Raymond L. Garthoff concludes there probably

9636-400: The Soviet Union, which at the time was undergoing the Era of Stagnation . This phase saw the new Soviet leader Mikhail Gorbachev introducing the liberalizing reforms of glasnost ("openness") and perestroika ("reorganization") and ending Soviet involvement in Afghanistan in 1989. Pressures for national sovereignty grew stronger in Eastern Europe, and Gorbachev refused to further support

9782-448: The Soviet Union, with an estimated 16 million deaths in the Soviet Union (half of whom were estimated to be killed on impact and the rest fatally injured) before bomber aircraft from the U.S. Strategic Air Command reached their targets. Although the Soviet Union had nuclear weapon capabilities at the beginning of the Cold War , the United States still had an advantage in terms of bombers and weapons. In any exchange of hostilities,

9928-499: The Soviet Union. A number of self-proclaimed Marxist–Leninist governments were formed in the second half of the 1970s in developing countries , including Angola , Mozambique , Ethiopia , Cambodia , Afghanistan , and Nicaragua . Détente collapsed at the end of the decade with the beginning of the Soviet–Afghan War in 1979. Beginning in the 1980s, this phase was another period of elevated tension. The Reagan Doctrine led to increased diplomatic, military, and economic pressures on

10074-455: The Soviets accumulated after broken promises by Stalin and Molotov concerning Europe and Iran. Following the World War II Anglo-Soviet invasion of Iran , the country was occupied by the Red Army in the far north and the British in the south. Iran was used by the United States and British to supply the Soviet Union, and the Allies agreed to withdraw from Iran within six months after the cessation of hostilities. However, when this deadline came,

10220-425: The Soviets agreed to withdraw from Iran after persistent US pressure, an early success of containment policy. By 1947, US president Harry S. Truman was outraged by the perceived resistance of the Soviet Union to American demands in Iran, Turkey, and Greece, as well as Soviet rejection of the Baruch Plan on nuclear weapons. In February 1947, the British government announced that it could no longer afford to finance

10366-404: The Soviets had permitted to retain democratic structures. The public brutality of the coup shocked Western powers more than any event up to that point, set in motion a brief scare that war would occur, and swept away the last vestiges of opposition to the Marshall Plan in the United States Congress. In an immediate aftermath of the crisis, the London Six-Power Conference was held, resulting in

10512-580: The Soviets remained in Iran under the guise of the Azerbaijan People's Government and Kurdish Republic of Mahabad . Shortly thereafter, on 5 March, former British prime minister Winston Churchill delivered his famous " Iron Curtain " speech in Fulton, Missouri . The speech called for an Anglo-American alliance against the Soviets, whom he accused of establishing an "iron curtain" dividing Europe from " Stettin in

10658-455: The Truman Doctrine marked the beginning of a US bipartisan defense and foreign policy consensus between Republicans and Democrats focused on containment and deterrence that weakened during and after the Vietnam War , but ultimately persisted thereafter. Moderate and conservative parties in Europe, as well as social democrats, gave virtually unconditional support to the Western alliance, while European and American Communists , financed by

10804-407: The U.S. and the Soviet Union began testing hydrogen bombs, and in 2018, following the failure of world leaders to address tensions relating to nuclear weapons and climate change issues. Since 2023, the Clock has been set at 90 seconds to midnight, the closest it has ever been. The most recent advance of the Clock's time setting was largely attributed to the risk of nuclear escalation that arose from

10950-549: The U.S. casualties from the preceding island-hopping campaigns , American commanders estimated that between 50,000 and 500,000 U.S. troops would die and at least 600,000–1,000,000 others would be injured while invading the Japanese home islands. The U.S. manufacture of 500,000 Purple Hearts from the anticipated high level of casualties during the U.S. invasion of Japan gave a demonstration of how deadly and costly it would be. President Harry S. Truman realized he could not afford such

11096-484: The US and a number of First World nations that were generally capitalist and liberal democratic but tied to a network of often authoritarian Third World states, most of which were the European powers' former colonies . The Eastern Bloc was led by the Soviet Union and its communist party , which had an influence across the Second World and was also tied to a network of authoritarian states. The Soviet Union had

11242-552: The US assistance, the Greek military won its civil war . Under the leadership of Alcide De Gasperi the Italian Christian Democrats defeated the powerful Communist – Socialist alliance in the elections of 1948 . All major powers engaged in espionage, using a great variety of spies, double agents , moles , and new technologies such as the tapping of telephone cables. The Soviet KGB ("Committee for State Security"),

11388-522: The US government gave to Western European countries over $ 13 billion (equivalent to $ 189 billion in 2016) to rebuild the economy of Europe . Later, the program led to the creation of the OECD . The plan's aim was to rebuild the democratic and economic systems of Europe and to counter perceived threats to the European balance of power , such as communist parties seizing control through revolutions or elections. The plan also stated that European prosperity

11534-415: The US nuclear war fighting plan/ SIOP every decade since. For example, the United States adopted a policy in 1996 of allowing the targeting of its nuclear weapons at non-state actors (" terrorists ") armed with weapons of mass destruction . Another dimension to the tactical use of nuclear weapons is that of such weapons deployed at sea for use against surface and submarine vessels. Until 1992, vessels of

11680-572: The US was trying to buy a pro-US re-alignment of Europe. Stalin therefore prevented Eastern Bloc nations from receiving Marshall Plan aid. The Soviet Union's alternative to the Marshall Plan, which was purported to involve Soviet subsidies and trade with central and eastern Europe, became known as the Molotov Plan (later institutionalized in January 1949 as the Council for Mutual Economic Assistance ). Stalin

11826-477: The USSR. In this way, this US would exercise " preponderant power ," oppose neutrality, and establish global hegemony . In the early 1950s (a period sometimes known as the " Pactomania "), the US formalized a series of alliances with Japan (a former WWII enemy), South Korea , Taiwan , Australia , New Zealand , Thailand and the Philippines (notably ANZUS in 1951 and SEATO in 1954), thereby guaranteeing

11972-516: The United Nations, was split up and dissolved in 1954 and 1975, also because of the détente between the West and Tito. The US and Britain merged their western German occupation zones into " Bizone " (1 January 1947, later "Trizone" with the addition of France's zone, April 1949). As part of the economic rebuilding of Germany, in early 1948, representatives of a number of Western European governments and

12118-509: The United States a number of long-term military bases. One of the more significant examples of the implementation of containment was the United Nations US-led intervention in the Korean War . In June 1950, after years of mutual hostilities, Kim Il Sung 's North Korean People's Army invaded South Korea at the 38th parallel . Stalin had been reluctant to support the invasion but ultimately sent advisers. To Stalin's surprise,

12264-527: The United States and the Soviet Union. On August 29, 1949, the Soviet Union tested its first nuclear weapon at Semipalatinsk in Kazakhstan (see also Soviet atomic bomb project ). Scientists in the United States from the Manhattan Project had warned that, in time, the Soviet Union would certainly develop nuclear capabilities of its own. Nevertheless, the effect upon military thinking and planning in

12410-401: The United States announced an agreement for a merger of western German areas into a federal governmental system. In addition, in accordance with the Marshall Plan , they began to re-industrialize and rebuild the West German economy, including the introduction of a new Deutsche Mark currency to replace the old Reichsmark currency that the Soviets had debased. The US had secretly decided that

12556-509: The United States developed and maintained a strategic force based on the Convair B-36 bomber that would be able to attack any potential enemy from bomber bases in the United States. It deployed atomic bombs around the world for potential use in conflicts. Over a period of a few years, many in the American defense community became increasingly convinced of the invincibility of the United States to

12702-416: The United States was dramatic, primarily because American military strategists had not anticipated the Soviets would "catch up" so soon. However, at this time, they had not discovered that the Soviets had conducted significant nuclear espionage of the project from spies at Los Alamos National Laboratory , the most significant of which was done by the theoretical physicist Klaus Fuchs . The first Soviet bomb

12848-469: The United States would have been capable of bombing the Soviet Union, whereas the Soviet Union would have more difficulty carrying out the reverse mission. The widespread introduction of jet -powered interceptor aircraft upset this imbalance somewhat by reducing the effectiveness of the American bomber fleet. In 1949 Curtis LeMay was placed in command of the Strategic Air Command and instituted

12994-480: The United States, the authority to produce and develop nuclear weapons was removed from military control and put instead under the civilian control of the United States Atomic Energy Commission . This decision reflected an understanding that nuclear weapons had unique risks and benefits that were separate from other military technology known at the time. For several years after World War II ,

13140-459: The United States. Nuclear warfare To date, the only use of nuclear weapons in armed conflict occurred in 1945 with the American atomic bombings of Hiroshima and Nagasaki . On August 6, 1945, a uranium gun-type device (code name " Little Boy ") was detonated over the Japanese city of Hiroshima . Three days later, on August 9, a plutonium implosion-type device (code name " Fat Man ")

13286-504: The Warsaw Pact's primary function was to safeguard Soviet hegemony over its Eastern European satellites, with the pact's only direct military actions having been the invasions of its own member states to keep them from breaking away; in the 1960s, the pact evolved into a multilateral alliance, in which the non-Soviet Warsaw Pact members gained significant scope to pursue their own interests. In 1961, Soviet-allied East Germany constructed

13432-469: The Western agencies paid special attention to debriefing Eastern Bloc defectors . Edward Jay Epstein describes that the CIA understood that the KGB used "provocations", or fake defections, as a trick to embarrass Western intelligence and establish Soviet double agents. As a result, from 1959 to 1973, the CIA required that East Bloc defectors went through a counterintelligence investigation before being recruited as

13578-493: The ability to undertake more limited engagements. "Sub-strategic use" includes the use of either "low-yield" tactical nuclear weapons, or of variable yield strategic nuclear weapons in a very limited role, as compared to exchanges of larger-yield strategic nuclear weapons over major population centers . This was described by the UK Parliamentary Defence Select Committee as "the launch of one or

13724-456: The accusation that the USSR was exerting increasing control over the countries lying in its sphere. He argued that there was nothing surprising in "the fact that the Soviet Union, anxious for its future safety, [was] trying to see to it that governments loyal in their attitude to the Soviet Union should exist in these countries." Soviet territorial demands to Turkey regarding the Dardanelles in

13870-547: The allocation of $ 400 million to intervene in the war and unveiled the Truman Doctrine , which framed the conflict as a contest between free peoples and totalitarian regimes. American policymakers accused the Soviet Union of conspiring against the Greek royalists in an effort to expand Soviet influence even though Stalin had told the Communist Party to cooperate with the British-backed government. Enunciation of

14016-526: The arsenals of the United States and the Soviet Union, Western Europe 's nuclear reserves were nevertheless a significant factor in strategic planning during the Cold War . A top-secret White paper , compiled by the Royal Air Force and produced for the British Government in 1959, estimated that British V bombers carrying nuclear weapons were capable of destroying key cities and military targets in

14162-464: The atomic raids on Hiroshima and Nagasaki. By early August 1945, an estimated 450,000 people had died as the U.S. had intensely firebombed a total of 67 Japanese cities. In late June 1945, as the U.S. wrapped up the two-and-a-half-month Battle of Okinawa (which cost the lives of 260,000 people, including 150,000 civilians), it was faced with the prospect of invading the Japanese home islands in an operation codenamed Operation Downfall . Based on

14308-426: The bureau responsible for foreign espionage and internal surveillance, was famous for its effectiveness. The most famous Soviet operation involved its atomic spies that delivered crucial information from the United States' Manhattan Project , leading the USSR to detonate its first nuclear weapon in 1949, four years after the American detonation and much sooner than expected. A massive network of informants throughout

14454-693: The chancellor of West Germany, with France the main opponent. Washington had the decisive voice. It was strongly supported by the Pentagon (the US military leadership), and weakly opposed by President Truman; the State Department was ambivalent. The outbreak of the Korean War in June 1950 changed the calculations and Washington now gave full support. That also involved naming Dwight D. Eisenhower in charge of NATO forces and sending more American troops to West Germany. There

14600-512: The colonial states underwent decolonization and achieved independence in the period from 1945 to 1960, many became Third World battlefields in the Cold War. At the end of World War II, English writer George Orwell used cold war , as a general term, in his essay "You and the Atomic Bomb", published 19 October 1945 in the British newspaper Tribune . Contemplating a world living in the shadow of

14746-508: The communist party. Radio and television organizations were state-owned, while print media was usually owned by political organizations, mostly by the local communist party. Soviet radio broadcasts used Marxist rhetoric to attack capitalism, emphasizing themes of labor exploitation, imperialism and war-mongering. Along with the broadcasts of the BBC and the Voice of America to Central and Eastern Europe,

14892-492: The country and was banned following the 1991 Soviet coup attempt that August. This in turn led to the formal dissolution of the Soviet Union in December 1991 and the collapse of Communist governments across much of Africa and Asia. The Russian Federation became the Soviet Union's successor state, while many of the other republics emerged from the Soviet Union's collapse as fully independent post-Soviet states . The United States

15038-517: The crushing of the Hungarian Revolution in 1956 and the Warsaw Pact invasion of Czechoslovakia in 1968. Both powers used economic aid in an attempt to win the loyalty of non-aligned countries , such as India . After the Sino-Soviet split between the USSR and China in 1961, the U.S. initiated contacts with China in 1972 . In the same year, the US and USSR signed a series of arms control treaties limiting their nuclear arsenals, which eased tensions in

15184-504: The destroyer of worlds." I suppose we all thought that one way or another. Immediately after the atomic bombings of Japan, the status of atomic weapons in international and military relations was unclear. Presumably, the United States hoped atomic weapons could offset the Soviet Union's larger conventional ground forces in Eastern Europe , and possibly be used to pressure Soviet leader Joseph Stalin into making concessions. Under Stalin,

15330-501: The difference between "strategic", "sub-strategic", and "tactical" use or weapons. American, French and British nuclear submarines are believed to carry at least some missiles with dial-a-yield warheads for this purpose, potentially allowing a strike as low as one kiloton (or less) against a single target. Only the People's Republic of China and the Republic of India have declarative, unqualified, unconditional " no first use " nuclear weapons policies. India and Pakistan maintain only

15476-424: The entire economic, social, and military infrastructure of the target nation, and would likely have a devastating effect on Earth's biosphere. Some Cold War strategists such as Henry Kissinger argued that a limited nuclear war could be possible between two heavily armed superpowers (such as the United States and the Soviet Union ). Some predict, however, that a limited war could potentially " escalate " into

15622-525: The first communist regime in the Western Hemisphere, and in 1962, the Cuban Missile Crisis began after deployments of U.S. missiles in Europe and Soviet missiles in Cuba; it is considered the closest the Cold War came to escalating into nuclear war . Another major proxy conflict was the Vietnam War of 1955 to 1975, which ended in defeat for the U.S. The USSR solidified its domination of Eastern Europe with

15768-401: The formation of NATO , which was essentially a defensive agreement in 1949. The Soviet Union countered with the Warsaw Pact in 1955, which had similar results with the Eastern Bloc. As by that time the Soviet Union already had an armed presence and political domination all over its eastern satellite states, the pact has been long considered superfluous. Although nominally a defensive alliance,

15914-522: The most optimistic predictions of the effects of a major nuclear exchange foresee the death of many millions of victims within a very short period of time. Such predictions usually include the breakdown of institutions, government, professional and commercial, vital to the continuation of civilization. The resulting loss of vital affordances (food, water and electricity production and distribution, medical and information services, etc.) would account for millions more deaths. More pessimistic predictions argue that

16060-414: The most prominent architects of America's early Cold War strategy, especially those who believed that the Cold War would eventually be fought by political rather than military means, such as George F. Kennan. Soviet and Eastern Bloc authorities used various methods to suppress Western broadcasts, including radio jamming . American policymakers, including Kennan and John Foster Dulles , acknowledged that

16206-542: The non-dock industrial production destroyed. The U.S., despite not having a third device ready to be dropped, gave Japan one last warning that there would be another bombing if they did not surrender, and the target would be Tokyo . Six days after the detonation over Nagasaki, Japan announced its surrender to the Allied Powers on August 15, 1945, signing the Instrument of Surrender on September 2, 1945, officially ending

16352-567: The planet, its ecosystems, and the global climate. A study presented at the annual meeting of the American Geophysical Union in December 2006 asserted that a small-scale regional nuclear war could produce as many direct fatalities as all of World War II and disrupt the global climate for a decade or more. In a regional nuclear conflict scenario in which two opposing nations in the subtropics each used 50 Hiroshima-sized nuclear weapons (c. 15 kiloton each) on major population centers,

16498-661: The policy change. Once again, the East Berlin communists attempted to disrupt the Berlin municipal elections , which were held on 5 December 1948 and produced a turnout of 86% and an overwhelming victory for the non-communist parties. The results effectively divided the city into East and West, the latter comprising US, British and French sectors. 300,000 Berliners demonstrated and urged the international airlift to continue, and US Air Force pilot Gail Halvorsen created " Operation Vittles ", which supplied candy to German children. The Airlift

16644-441: The political decision-making level on either side. Similarly, there is no evidence, on either side, of any major political or military decision that was prematurely discovered through espionage and thwarted by the other side. There also is no evidence of any major political or military decision that was crucially influenced (much less generated) by an agent of the other side. According to historian Robert L. Benson, "Washington's forte

16790-474: The presence of the Red Army —alarmed the US and UK. Western leaders saw this as a clear instance of Soviet expansionism, clashing with their vision of a democratic Europe. Economically, the divide was sharpened with the introduction of the Marshall Plan in 1947, a US initiative to provide financial aid to rebuild Europe and prevent the spread of communism by stabilizing capitalist economies. The Soviet Union rejected

16936-465: The process was not the nuclear attacks, but the Operation Meetinghouse raid on Tokyo . On the night of March 9–10, 1945, Operation Meetinghouse commenced and 334 Boeing B-29 Superfortress bombers took off to raid, with 279 of them dropping 1,665 tons of incendiaries and explosives on Tokyo . The bombing was meant to burn wooden buildings and indeed the bombing caused fire that created

17082-407: The researchers predicted fatalities ranging from 2.6 million to 16.7 million per country. The authors of the study estimated that as much as five million tons of soot could be released, producing a cooling of several degrees over large areas of North America and Eurasia (including most of the grain-growing regions). The cooling would last for years and could be "catastrophic", according to

17228-640: The researchers. Either a limited or full-scale nuclear exchange could occur during an accidental nuclear war , in which the use of nuclear weapons is triggered unintentionally. Postulated triggers for this scenario have included malfunctioning early warning devices and/or targeting computers, deliberate malfeasance by rogue military commanders, consequences of an accidental straying of warplanes into enemy airspace, reactions to unannounced missile tests during tense diplomatic periods, reactions to military exercises, mistranslated or miscommunicated messages, and others. A number of these scenarios actually occurred during

17374-424: The rest of the world were lost to them. This option was rejected with the formation of NATO and the decision to permanently station troops in Europe. In the summer of 1951, Project Vista started, in which project analysts such as Robert F. Christy looked at how to defend Western Europe from a Soviet invasion. The emerging development of tactical nuclear weapons was looked upon as a means to give Western forces

17520-670: The security of nuclear weapons in newer nuclear powers with relatively less stable governments, such as Pakistan , but in each case, the fears have been addressed to some extent by statements and evidence provided by those nations, as well as cooperative programs between nations. Worry remains, however, in many circles that a relative decrease in the security of nuclear weapons has emerged in recent years, and that terrorists or others may attempt to exert control over (or use) nuclear weapons, militarily applicable technology, or nuclear materials and fuel. Another possible nuclear terrorism threat are devices designed to disperse radioactive materials over

17666-528: The social structure that would probably prevail in a state which was at once unconquerable and in a permanent state of "cold war" with its neighbours. In The Observer of 10 March 1946, Orwell wrote, "...after the Moscow conference last December, Russia began to make a 'cold war' on Britain and the British Empire." The first use of the term to describe the specific post-war geopolitical confrontation between

17812-462: The source of the term, Lippmann traced it to a French term from the 1930s, la guerre froide . The roots of the Cold War can be traced back to diplomatic and military tensions preceding World War II. The 1917 Russian Revolution and the subsequent Treaty of Brest-Litovsk , where Soviet Russia ceded vast territories to Germany, deepened distrust among the Western Allies. Allied intervention in

17958-432: The state of conflict and extreme tension that became known as the Cold War . In 1974, India , and in 1998, Pakistan , two countries that were openly hostile toward each other, developed nuclear weapons. Israel (1960s) and North Korea (2006) are also thought to have developed stocks of nuclear weapons, though it is not known how many. The Israeli government has never admitted nor denied having nuclear weapons, although it

18104-535: The struggle for dominance was expressed indirectly via psychological warfare , propaganda campaigns , espionage , far-reaching embargoes , sports diplomacy , and technological competitions such as the Space Race . The US and USSR were both part of the Allies of World War II , the military coalition which had defeated Nazi Germany and Imperial Japan in 1945. After the war, the USSR installed satellite governments in

18250-557: The territories of Eastern and Central Europe it had occupied, and promoted the spread of communism to North Korea in 1948 and created an alliance with the People's Republic of China in 1949. The US declared the Truman Doctrine of " containment " in 1947 as communist-led uprisings led to the Greek Civil War and First Indochina War , launched the Marshall Plan in 1948 to assist in Western Europe's economic recovery, and founded

18396-414: The threat of nuclear warfare , Orwell looked at James Burnham 's predictions of a polarized world, writing: Looking at the world as a whole, the drift for many decades has been not towards anarchy but towards the reimposition of slavery... James Burnham's theory has been much discussed, but few people have yet considered its ideological implications—that is, the kind of world-view, the kind of beliefs, and

18542-473: The world. Movements against nuclear weapons testing and for nuclear disarmament took place, with large anti-war protests . By the 1970s, both sides had started making allowances for peace and security, ushering in a period of détente that saw the Strategic Arms Limitation Talks and the 1972 visit by Richard Nixon to China that opened relations with China as a strategic counterweight to

18688-491: The worst came to the worst and one-half dies, there will still be one-half left, but imperialism would be razed to the ground and the whole world would become socialist. After a few years there would be 2.7 billion people again. The concept of a "Fortress North America" emerged during the Second World War and persisted into the Cold War to refer to the option of defending Canada and the United States against their enemies if

18834-497: Was 'signals' intelligence - the procurement and analysis of coded foreign messages." leading to the Venona project or Venona intercepts, which monitored the communications of Soviet intelligence agents. Moynihan wrote that the Venona project contained "overwhelming proof of the activities of Soviet spy networks in America, complete with names, dates, places, and deeds." The Venona project

18980-408: Was a small response compared to the construction of a huge fleet of nuclear bombers. The principal nuclear strategy was to massively penetrate the Soviet Union. Because such a large area could not be defended against this overwhelming attack in any credible way, the Soviet Union would lose any exchange. This logic became ingrained in American nuclear doctrine and persisted for much of the duration of

19126-412: Was a strong promise that West Germany would not develop nuclear weapons. Widespread fears of another rise of German militarism necessitated the new military to operate within an alliance framework under NATO command. In 1955, Washington secured full German membership of NATO. In May 1953, Lavrentiy Beria , by then in a government post, had made an unsuccessful proposal to allow the reunification of

19272-547: Was also fearful of a reconstituted Germany; his vision of a post-war Germany did not include the ability to rearm or pose any kind of threat to the Soviet Union. In early 1948, following reports of strengthening "reactionary elements", Czech Communists executed a coup d'état in Czechoslovakia (resulting in the formation of the Czechoslovak Socialist Republic (9 May 1948)), the only Eastern Bloc state that

19418-433: Was as much a logistical as a political and psychological success for the West; it firmly linked West Berlin to the United States. In May 1949, Stalin backed down and lifted the blockade. In 1952, Stalin repeatedly proposed a plan to unify East and West Germany under a single government chosen in elections supervised by the United Nations, if the new Germany were to stay out of Western military alliances, but this proposal

19564-648: Was contingent upon German economic recovery. One month later, Truman signed the National Security Act of 1947 , creating a unified Department of Defense , the Central Intelligence Agency (CIA), and the National Security Council (NSC). These would become the main bureaucracies for US defense policy in the Cold War. Stalin believed economic integration with the West would allow Eastern Bloc countries to escape Soviet control, and that

19710-427: Was detonated over the Japanese city of Hiroshima with an energy of about 15 kilotons of TNT (63,000 gigajoules), destroying nearly 50,000 buildings (including the headquarters of the 2nd General Army and Fifth Division ) and killing approximately 70,000 people, including 20,000 Japanese combatants and 20,000 Korean slave laborers. Three days later, on August 9, a plutonium-type nuclear weapon codenamed " Fat Man "

19856-500: Was detonated over the Japanese city of Nagasaki . Together, these two bombings resulted in the deaths of approximately 200,000 people and contributed to the surrender of Japan , which occurred before any further nuclear weapons could be deployed. After World War II , nuclear weapons were also developed by the Soviet Union (1949), the United Kingdom (1952), France (1960), and the People's Republic of China (1964), which contributed to

20002-463: Was kept highly secret even from policymakers until the Moynihan Commission in 1995. Despite this, the decryption project had already been betrayed and dispatched to the USSR by Kim Philby and Bill Weisband in 1946, as was discovered by the US by 1950. Nonetheless, the Soviets had to keep their discovery of the program secret, too, and continued leaking their own information, some of which

20148-502: Was left as the world's sole superpower. In February 1946, George F. Kennan 's " Long Telegram " from Moscow to Washington helped to articulate the US government's increasingly hard line against the Soviets, which would become the basis for US strategy toward the Soviet Union for the duration of the Cold War. The telegram galvanized a policy debate that would eventually shape the Truman administration 's Soviet policy. Washington's opposition to

20294-541: Was more or less a deliberate copy of the Fat Man plutonium device. In the same year the first US-Soviet nuclear war plan was penned in the US with Operation Dropshot . With the monopoly over nuclear technology broken, worldwide nuclear proliferation accelerated. The United Kingdom tested its first independent atomic bomb in 1952, followed by France developing its first atomic bomb in 1960 and then China developing its first atomic bomb in 1964. While much smaller than

20440-540: Was now restricted to the island of Taiwan , the nationalist government of which exists to this day. The Kremlin promptly created an alliance with the newly formed People's Republic of China. According to Norwegian historian Odd Arne Westad , the communists won the Civil War because they made fewer military mistakes than Chiang Kai-Shek made, and because in his search for a powerful centralized government, Chiang antagonized too many interest groups in China. Moreover, his party

20586-403: Was parity in the quantity and quality of secret information obtained by each side. However, the Soviets probably had an advantage in terms of HUMINT (human intelligence or interpersonal espionage) and "sometimes in its reach into high policy circles." In terms of decisive impact, however, he concludes: We also can now have high confidence in the judgment that there were no successful "moles" at

20732-604: Was particularly exacerbated by the fact that such weapons at sea were not constrained by the safeguards provided by the Permissive Action Link attached to U.S. Air Force and Army nuclear weapons. It is unknown if the navies of the other nuclear powers yet today deploy tactical nuclear weapons at sea. The 2018 US Nuclear Posture Review emphasised the need for the US to have sub-strategic nuclear weapons as additional layers for its nuclear deterrence. Nuclear terrorism by non-state organizations or actors (even individuals)

20878-486: Was still useful to the American program. According to Moynihan, even President Truman may not have been fully informed of Venona, which may have left him unaware of the extent of Soviet espionage. Clandestine atomic spies from the Soviet Union, who infiltrated the Manhattan Project at various points during WWII, played a major role in increasing tensions that led to the Cold War. In addition to usual espionage,

21024-625: Was turned down by the Western powers. Some sources dispute the sincerity of the proposal. Britain, France, the United States, Canada and eight other western European countries signed the North Atlantic Treaty of April 1949, establishing the North Atlantic Treaty Organization (NATO). That August, the first Soviet atomic device was detonated in Semipalatinsk , Kazakh SSR . Following Soviet refusals to participate in

21170-491: Was used against the Japanese city of Nagasaki, with the explosion equivalent to about 20 kilotons of TNT (84,000 gigajoules), destroying 60% of the city and killing approximately 35,000 people, including 23,200–28,200 Japanese munitions workers, 2,000 Korean slave laborers, and 150 Japanese combatants. The industrial damage in Nagasaki was high, partly owing to the inadvertent targeting of the industrial zone, leaving 68–80 percent of

21316-483: Was weakened during the war against Japan . Meanwhile, the communists told different groups, such as the peasants, exactly what they wanted to hear, and they cloaked themselves under the cover of Chinese nationalism . Confronted with the communist revolution in China and the end of the American atomic monopoly in 1949, the Truman administration quickly moved to escalate and expand its containment doctrine. In NSC 68 ,

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