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The Bhumibol Dam ( formerly known as the Yanhi Dam ) is a concrete arch dam on the Ping River , a tributary of the Chao Phraya River , in Sam Ngao District of Tak Province , Thailand . It is about 480 km (298 mi) north of Bangkok and was built for the purposes of water storage, hydroelectric power production, flood control, fisheries and saltwater intrusion management. The dam was named after King Bhumibol Adulyadej and it was Thailand's first multi-purpose project. It is the highest dam in Thailand at 154 m (505 ft) tall.

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120-459: The dam was originally called Yanhee Dam in 1951 when the government of prime minister Field Marshal Plaek Pibulsongkram initiated the project. It was renamed Bhumibol Dam in 1957. The dam, among others in the Chao Phraya basin, was constructed beginning in the 1950s to exploit the agricultural and hydroelectric potential of the basin. Construction on the dam began in 1958 and was finished in 1964 at

240-637: A Neutrality Pact in April 1941, and Japan adopted the doctrine of Nanshin-ron , promoted by the Navy, which took its focus southward and eventually led to war with the United States and the Western Allies. In Europe, Germany and Italy were becoming more aggressive. In March 1938, Germany annexed Austria , again provoking little response from other European powers. Encouraged, Hitler began pressing German claims on

360-564: A cautious French probe into the Saarland . The Western Allies also began a naval blockade of Germany , which aimed to damage the country's economy and war effort. Germany responded by ordering U-boat warfare against Allied merchant and warships, which would later escalate into the Battle of the Atlantic . On 8 September, German troops reached the suburbs of Warsaw . The Polish counter-offensive to

480-467: A military alliance with Japan. The following month, on 25 January 1942, Phibun declared war on Britain and the United States. South Africa and New Zealand declared war on Thailand on the same day. Australia followed soon after. Phibun purged all who opposed the Japanese alliance from his government. Pridi Banomyong was appointed acting regent for the absent King Ananda Mahidol , while Direk Jayanama ,

600-1028: A monk in the Buddhist temple in Bodhgaya . Phibun died on 11 June 1964 from heart failure in Tokyo, Japan. After his death, Phibun's ashes were transferred to Thailand in an urn and decorated with military honours in Wat Phra Sri Mahathat (also called "The Temple of Democracy") he had founded in Bang Khen . Plaek Phibunsongkhram received the following royal decorations in the Honours System of Thailand: Monarchy of Thailand Regents of Thailand Prime Ministers of Thailand Military Others Institutions Key events World War II Asia-Pacific Mediterranean and Middle East Other campaigns Coups World War II or

720-465: A border with them and felt threatened by a potential Japanese invasion. Phibun's administration also realised that Thailand would have to fend for itself if a Japanese invasion came, considering its deteriorating relationships with Western powers in the area. When the Japanese invaded Thailand on 8 December 1941, (because of the International Date Line this occurred an hour and a half before

840-569: A ceremony aboard the Manhattan , a US dredge boat , when he was taken hostage by a group of Royal Thai Navy officers, who then quickly confined him aboard the warship Sri Ayutthaya . Negotiations between the government and the coup organizers swiftly broke down, leading to violent street fighting in Bangkok between the navy and the army, which was supported by the Royal Thai Air Force . Phibun

960-595: A cost of 3.5 billion baht . The reservoir was completely filled in 1970. The first two generators were commissioned in 1964. In 1972, the Sirikit Dam was completed on the Nan River , one of two major tributaries of the Chao Phraya including the Ping. The Bhumibol and Sirikit Dams control 22 percent of the Chao Phraya's annual runoff combined. Both dams also help provide for the irrigation of 1,200,000 ha (4,633 sq mi) in

1080-767: A façade of democracy. Phibun's second term as prime minister was plagued by political instability and several attempts to launch a coup d'etat against him were made, including the Army General Staff plot in 1948, the Palace Rebellion in 1949, and the Manhattan Rebellion in 1951. Phibun attempted to transform Thailand into an electoral democracy from the mid-1950s onward, but was overthrown in 1957 and went into exile in Japan, where he died in 1964. At fifteen years and one month, Phibun's term as Prime Minister of Thailand

1200-595: A façade of democracy. The beginning of the Cold War saw Phibun align Thailand with the anti-communist camp. Phibun supported UN action in the Korean War and dispatched an expeditionary force of 4,000 troops. and received large quantities of US aid following Thailand's entry into the Korean War as part of the United Nations Command 's multi-national allied force against the communist forces of North Korea and

1320-514: A pretext to initiate the invasion. The first German attack of the war came against the Polish defences at Westerplatte . The United Kingdom responded with an ultimatum for Germany to cease military operations, and on 3 September, after the ultimatum was ignored, Britain and France declared war on Germany. During the Phoney War period, the alliance provided no direct military support to Poland, outside of

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1440-765: A pretext to worsen relations. On 29 August, Hitler demanded that a Polish plenipotentiary immediately travel to Berlin to negotiate the handover of Danzig , and to allow a plebiscite in the Polish Corridor in which the German minority would vote on secession. The Poles refused to comply with the German demands, and on the night of 30–31 August in a confrontational meeting with the British ambassador Nevile Henderson , Ribbentrop declared that Germany considered its claims rejected. On 1 September 1939, Germany invaded Poland after having staged several false flag border incidents as

1560-469: A secret protocol that defined German and Soviet "spheres of influence" (western Poland and Lithuania for Germany; eastern Poland , Finland, Estonia , Latvia and Bessarabia for the Soviet Union), and raised the question of continuing Polish independence. The pact neutralised the possibility of Soviet opposition to a campaign against Poland and assured that Germany would not have to face the prospect of

1680-743: A similar pact and rejected ceding part of its territory to the Soviet Union. The Soviet Union invaded Finland in November 1939, and was subsequently expelled from the League of Nations for this crime of aggression. Despite overwhelming numerical superiority, Soviet military success during the Winter War was modest, and the Finno-Soviet war ended in March 1940 with some Finnish concessions of territory . In June 1940,

1800-519: A two-front war, as it had in World War   I. Immediately afterwards, Hitler ordered the attack to proceed on 26 August, but upon hearing that the United Kingdom had concluded a formal mutual assistance pact with Poland and that Italy would maintain neutrality, he decided to delay it. In response to British requests for direct negotiations to avoid war, Germany made demands on Poland, which served as

1920-522: Is 8 m (26 ft) high, 300 m (984 ft) long and has a storage capacity of 5,000,000 m (4,054 acre⋅ft). In off-peak hours, the one pump-turbine returns water back into the Bhumibol (upper) reservoir and when demand is high, the pump serves as a generator for power production. The power plant contains eight turbines for an installed capacity of 779.2 megawatts (1,044,900 hp). Six are 76.3 megawatts (102,300 hp) Francis-type , one

2040-502: Is a 115 megawatts (154,000 hp) Pelton turbine and one is a 175 megawatts (235,000 hp) Francis pump-turbine. The dam's power house underwent upgrades and renovations in the 1990s. Plaek Pibulsongkram Field Marshal Plaek Phibunsongkhram (14 July 1897 – 11 June 1964), locally known as Marshal P. , and contemporarily known as Phibun in the West, was a Thai politician, military officer, and revolutionary who served as

2160-452: Is an arch-gravity type and is 154 m (505 ft) tall, 486 m (1,594 ft) long and 8 m (26 ft) wide at its crest. It withholds a reservoir of 13,462,000,000 m (10,913,821 acre⋅ft) of which 9,762,000,000 m (7,914,182 acre⋅ft) is active or "useful" storage. The dam's catchment area is 26,400 km (10,193 sq mi) while its surface area is 300 km (116 sq mi). The Lower Mae Ping Dam

2280-588: The Anglo-German Naval Agreement and the German–Polish declaration of non-aggression . The situation became a crisis in late August as German troops continued to mobilise against the Polish border. On 23 August the Soviet Union signed a non-aggression pact with Germany, after tripartite negotiations for a military alliance between France, the United Kingdom, and Soviet Union had stalled. This pact had

2400-662: The British Empire , with fighting in the Balkans , Mediterranean, and Middle East , the aerial Battle of Britain and the Blitz , and naval Battle of the Atlantic . Through a series of campaigns and treaties, Germany took control of much of continental Europe and formed the Axis alliance with Italy , Japan , and other countries. In June 1941, Germany led the European Axis in an invasion of

2520-799: The Commander of the Royal Siamese Army . Phibun became a de facto dictator, and established a military dictatorship , consolidating his position by rewarding several members of his own army clique with influential positions in his government. After the revolution of 1932, the Thai government of Phraya Phahol was impressed by the success of the March on Rome of Benito Mussolini 's Italian fascist movement. Phibun, also an admirer of Italian fascism, sought to replicate fascist-style propaganda tactics, valued in Italy as one of

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2640-901: The Fall of France in June 1940 and the Japanese invasion of French Indochina in September 1940 to advance Thai interests in French Indochina following a border dispute with France . Phibun believed Thailand could recover territories ceded to France by King Rama V because the French would avoid armed confrontation or offer serious resistance. Thailand fought against Vichy France over the disputed areas from October 1940 to May 1941. The technologically and numerically superior Thai force invaded French Indochina and attacked military targets in major cities. Despite Thai successes,

2760-566: The German Revolution of 1918–1919 , and a democratic government, later known as the Weimar Republic , was created. The interwar period saw strife between supporters of the new republic and hardline opponents on both the political right and left. Italy, as an Entente ally, had made some post-war territorial gains; however, Italian nationalists were angered that the promises made by the United Kingdom and France to secure Italian entrance into

2880-814: The German invasion of Poland and the United Kingdom and France 's declaration of war on Germany two days later on 3 September 1939. Dates for the beginning of the Pacific War include the start of the Second Sino-Japanese War on 7 July 1937, or the earlier Japanese invasion of Manchuria , on 19 September 1931. Others follow the British historian A. J. P. Taylor , who stated that the Sino-Japanese War and war in Europe and its colonies occurred simultaneously, and

3000-567: The Italian mainland , and Allied offensives in the Pacific—cost the Axis powers their initiative and forced them into strategic retreat on all fronts. In 1944, the Western Allies invaded German-occupied France at Normandy , while the Soviet Union regained its territorial losses and pushed Germany and its allies westward. At the same time, Japan suffered reversals in mainland Asia, while the Allies crippled

3120-537: The Japanese Navy and captured key islands . The war in Europe concluded with the liberation of German-occupied territories ; the invasion of Germany by the Western Allies and the Soviet Union, culminating in the fall of Berlin to Soviet troops; Hitler's suicide ; and the German unconditional surrender on 8 May 1945 . Following the refusal of Japan to surrender on the terms of the Potsdam Declaration ,

3240-682: The League of Nations as a force to preserve peace. Both Italy and Ethiopia were member nations, but the League did little when the former clearly violated Article X of the League's Covenant . The United Kingdom and France supported imposing sanctions on Italy for the invasion, but the sanctions were not fully enforced and failed to end the Italian invasion. Italy subsequently dropped its objections to Germany's goal of absorbing Austria . When civil war broke out in Spain, Hitler and Mussolini lent military support to

3360-639: The National Assembly ousted Phibun as prime minister and his six-year reign as the military commander-in-chief came to an end. Phibun's resignation was partly forced by two grandiose plans: one was to relocate the capital from Bangkok to a remote site in the jungle near Phetchabun in north central Thailand, and another was to build a "Buddhist city" in Saraburi . Announced at a time of severe economic difficulty, these ideas turned many government officers against him. After his resignation, Phibun went to stay at

3480-693: The Nationalist rebels , led by General Francisco Franco . Italy supported the Nationalists to a greater extent than the Nazis: Mussolini sent more than 70,000 ground troops, 6,000 aviation personnel, and 720 aircraft to Spain. The Soviet Union supported the existing government of the Spanish Republic . More than 30,000 foreign volunteers, known as the International Brigades , also fought against

3600-466: The Palace Rebellion was another failed coup attempt against Phibun to restore Pridi Phanomyong by occupying the Grand Palace in Bangkok and declaring a new government led by Direk Jayanama , a close associate of Pridi. The civilian rebels were quickly ousted from the palace, but fighting broke out between military rebels and loyalists which lasted for over a week. On 29 June 1951, Phibun was attending

3720-677: The Rome–Berlin Axis . A month later, Germany and Japan signed the Anti-Comintern Pact , which Italy joined the following year. The Kuomintang (KMT) party in China launched a unification campaign against regional warlords and nominally unified China in the mid-1920s, but was soon embroiled in a civil war against its former Chinese Communist Party (CCP) allies and new regional warlords . In 1931, an increasingly militaristic Empire of Japan , which had long sought influence in China as

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3840-603: The Second World War (1 September 1939 – 2 September 1945) was a global conflict between two coalitions: the Allies and the Axis powers . Nearly all the world's countries —including all the great powers —participated, with many investing all available economic, industrial, and scientific capabilities in pursuit of total war , blurring the distinction between military and civilian resources. Tanks and aircraft played major roles , with

3960-657: The Seri Manangkhasila Party , which was dominated by the most influential in the military and the government. The Employment Act of January 1957 legalized trade unions, limited weekly working hours, regulated holidays and overtime , and instituted health and safety regulations. The International Workers' Day became a public holiday. Phibun's second premiership was longer but plagued with political instability , and there were numerous attempts to oppose his rule and remove him from power. Unlike his first premiership, Phibun faced noticeable opposition from people connected to

4080-581: The Soviet–Japanese Neutrality Pact in April 1941. By contrast, the Germans were steadily making preparations for an attack on the Soviet Union, massing forces on the Soviet border. Hitler believed that the United Kingdom's refusal to end the war was based on the hope that the United States and the Soviet Union would enter the war against Germany sooner or later. On 31 July 1940, Hitler decided that

4200-580: The Stresa Front in April 1935 in order to contain Germany, a key step towards military globalisation ; however, that June, the United Kingdom made an independent naval agreement with Germany, easing prior restrictions. The Soviet Union, concerned by Germany's goals of capturing vast areas of Eastern Europe , drafted a treaty of mutual assistance with France. Before taking effect, though, the Franco-Soviet pact

4320-523: The Sudetenland , an area of Czechoslovakia with a predominantly ethnic German population. Soon the United Kingdom and France followed the appeasement policy of British Prime Minister Neville Chamberlain and conceded this territory to Germany in the Munich Agreement , which was made against the wishes of the Czechoslovak government, in exchange for a promise of no further territorial demands. Soon afterwards, Germany and Italy forced Czechoslovakia to cede additional territory to Hungary, and Poland annexed

4440-428: The Tanggu Truce was signed in 1933. Thereafter, Chinese volunteer forces continued the resistance to Japanese aggression in Manchuria , and Chahar and Suiyuan . After the 1936 Xi'an Incident , the Kuomintang and CCP forces agreed on a ceasefire to present a united front to oppose Japan. The Second Italo-Ethiopian War was a brief colonial war that began in October 1935 and ended in May 1936. The war began with

4560-466: The Trans-Olza region of Czechoslovakia. Although all of Germany's stated demands had been satisfied by the agreement, privately Hitler was furious that British interference had prevented him from seizing all of Czechoslovakia in one operation. In subsequent speeches Hitler attacked British and Jewish "war-mongers" and in January 1939 secretly ordered a major build-up of the German navy to challenge British naval supremacy. In March 1939, Germany invaded

4680-506: The Treaty of Craiova . The loss of one-third of Romania's 1939 territory caused a coup against King Carol II, turning Romania into a fascist dictatorship under Marshal Ion Antonescu , with a course set towards the Axis in the hopes of a German guarantee. Meanwhile, German-Soviet political relations and economic co-operation gradually stalled, and both states began preparations for war. In April 1940, Germany invaded Denmark and Norway to protect shipments of iron ore from Sweden , which

4800-401: The United Kingdom and France to declare war on Germany. Poland was divided between Germany and the Soviet Union under the Molotov–Ribbentrop Pact , in which they had agreed on " spheres of influence " in Eastern Europe. In 1940, the Soviets annexed the Baltic states and parts of Finland and Romania . After the fall of France in June 1940, the war continued mainly between Germany and

4920-426: The Wehrmacht rapidly advanced to the Channel and cut off the Allied forces in Belgium, trapping the bulk of the Allied armies in a cauldron on the Franco-Belgian border near Lille. The United Kingdom was able to evacuate a significant number of Allied troops from the continent by early June, although they had to abandon almost all their equipment. On 10 June, Italy invaded France , declaring war on both France and

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5040-451: The aftermath of World War I and the rise of fascism in Europe and militarism in Japan . Key events leading up to the war included Japan's invasion of Manchuria , the Spanish Civil War , the outbreak of the Second Sino-Japanese War , and Germany's annexations of Austria and the Sudetenland . World War II is generally considered to have begun on 1 September 1939, when Nazi Germany , under Adolf Hitler , invaded Poland , prompting

5160-450: The attack on Pearl Harbor ), Phibun was reluctantly forced to order a general ceasefire after just one day of resistance and allow the Japanese armies to use the country as a base for their invasions of the British colonies of Burma and Malaya . Hesitancy, however, gave way to enthusiasm after the Japanese rolled through the Malayan Campaign in a " Bicycle Blitzkrieg" with surprisingly little resistance. On 21 December Phibun signed

5280-457: The interwar period . Phibun adopted the fascist salute , modelled on the Roman salute , using it during speeches. The salute was not compulsory in Thailand, and it was opposed by Luang Wichitwathakan and many cabinet members as they believed it inappropriate for Thai culture. Together with Wichitwathakan, the Minister of Propaganda, he built a leadership cult in 1938 and thereafter. Photographs of Phibun were to be found everywhere, and those of

5400-404: The reunification of East and West Germany to take place and resolved most post–World War   II issues. No formal peace treaty between Japan and the Soviet Union was ever signed, although the state of war between the two countries was terminated by the Soviet–Japanese Joint Declaration of 1956 , which also restored full diplomatic relations between them. World War I had radically altered

5520-538: The 1950s and 1960s among the leaders of China. Phibun was reportedly thrilled by the democracy and freedom of speech he had witnessed during a long trip abroad to the United States and Europe in 1955. Following the example of Hyde Park in London, he set up a " Speakers' Corner " at the Sanam Luang in Bangkok. Phibun began to democratize Thailand by allowing the formation of new political parties, amnestied political opponents, and planned free elections . Phibun founded and became chairman of his own new political party,

5640-402: The 3rd prime minister of Thailand from 1938 to 1944 and again from 1948 to 1957. Phibun was a member of the army wing of Khana Ratsadon , the first political party in Thailand, and a leader of the Siamese revolution of 1932 , which replaced Thailand's absolute monarchy with a constitutional monarchy . Phibun became the third Prime Minister of Thailand in 1938 while serving as Commander of

5760-409: The Allies were attempting to cut off . Denmark capitulated after six hours , and despite Allied support , Norway was conquered within two months. British discontent over the Norwegian campaign led to the resignation of Prime Minister Neville Chamberlain , who was replaced by Winston Churchill on 10   May 1940. On the same day, Germany launched an offensive against France . To circumvent

5880-400: The Axis war against the Soviet Union, in Romania's case partially to recapture territory ceded to the Soviet Union . In early June 1940, the Italian Regia Aeronautica attacked and besieged Malta , a British possession. From late summer to early autumn, Italy conquered British Somaliland and made an incursion into British-held Egypt . In October, Italy attacked Greece , but the attack

6000-554: The Bhumibol Dam contributed 73.66 percent of Thailand's power generation and in 2003 that number was 2 percent. During the 2011 Thailand floods , rainfall for March 2011 over the area of northern Thailand was an extraordinary 344 percent above normal. Bhumibol Dam in particular got 242.8 millimetres (9.56 in) of rain, 224.7 millimetres (8.85 in) above the mean of 25.2 millimetres (0.99 in) and since 1 January had accumulated 245.9 millimetres (9.68 in), 216 millimetres (8.5 in) or 186 percent above normal. The dam

6120-421: The Blitz , but largely ended in May 1941 after failing to significantly disrupt the British war effort. Using newly captured French ports, the German Navy enjoyed success against an over-extended Royal Navy , using U-boats against British shipping in the Atlantic . The British Home Fleet scored a significant victory on 27   May 1941 by sinking the German battleship Bismarck . In November 1939,

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6240-405: The European Axis declaring war on the US. Japan conquered much of coastal China and Southeast Asia , but its advances in the Pacific were halted in mid-1942 after its defeat in the naval Battle of Midway ; Germany and Italy were defeated in North Africa and at Stalingrad in the Soviet Union. Key setbacks in 1943—including German defeats on the Eastern Front, the Allied invasions of Sicily and

6360-522: The Free Thai Movement due to his alliance with the Japanese, including from within the military. Additionally, Phibun was indebted to the powerful Coup Group that had returned him to power. On 1 October 1948, the unsuccessful Army General Staff Plot was launched by members of the army general staff to topple his government, but failed when discovered by the Coup Group. As a result, more than fifty army and reserve officers and several prominent supporters of Pridi Phanomyong were arrested. On 26 February 1949,

6480-410: The French possessions of Syria and Lebanon , assisted by the Free French . With the situation in Europe and Asia relatively stable, Germany, Japan, and the Soviet Union made preparations for war. With the Soviets wary of mounting tensions with Germany, and the Japanese planning to take advantage of the European War by seizing resource-rich European possessions in Southeast Asia , the two powers signed

6600-439: The French tactical victory at the Battle of Ko Chang prompted intervention from the Japanese , who mediated an armistice where the French were forced to cede the disputed territories to Thailand. Phibun and the Thai public viewed the outcome of the Franco-Thai War as a victory, but it resulted in the rapidly expanding Japanese gaining the right to occupy French Indochina. Although Phibun was ardently pro-Japanese, he now shared

6720-426: The Germans, and the last large operational unit of the Polish Army surrendered on 6   October . Despite the military defeat, Poland never surrendered; instead, it formed the Polish government-in-exile and a clandestine state apparatus remained in occupied Poland. A significant part of Polish military personnel evacuated to Romania and Latvia; many of them later fought against the Axis in other theatres of

6840-450: The Nationalists. Both Germany and the Soviet Union used this proxy war as an opportunity to test in combat their most advanced weapons and tactics. The Nationalists won the civil war in April 1939; Franco, now dictator, remained officially neutral during World War   II but generally favoured the Axis . His greatest collaboration with Germany was the sending of volunteers to fight on the Eastern Front . In July 1937, Japan captured

6960-402: The People's Republic of China. Phibun's anti-Chinese campaign was resumed, with the government restricting Chinese immigration and undertaking various measures to restrict economic domination of the Thai market by those of Chinese descent. Chinese schools and associations were once again shut down. Despite open pro-Western and anti-Chinese policies, in the late 1950s Phibun arranged to send two of

7080-452: The Royal Navy putting three Italian battleships out of commission after a carrier attack at Taranto , and neutralising several more warships at the Battle of Cape Matapan . Italian defeats prompted Germany to deploy an expeditionary force to North Africa; at the end of March 1941, Rommel 's Afrika Korps launched an offensive which drove back Commonwealth forces. In less than a month, Axis forces advanced to western Egypt and besieged

7200-405: The Royal Siamese Army . Inspired by the Italian fascism of Benito Mussolini , he established a de facto military dictatorship run along fascist lines, promoted Thai nationalism and Sinophobia , and allied Thailand with Imperial Japan in World War II . Phibun launched a modernization campaign known as the Thai Cultural Revolution that included a series of cultural mandates , which changed

7320-423: The Soviet Union occupied the entire territories of Estonia, Latvia and Lithuania, as well as the Romanian regions of Bessarabia, Northern Bukovina, and the Hertsa region . In August 1940, Hitler imposed the Second Vienna Award on Romania which led to the transfer of Northern Transylvania to Hungary. In September 1940, Bulgaria demanded Southern Dobruja from Romania with German and Italian support, leading to

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7440-421: The Soviet Union , opening the Eastern Front and initially making large territorial gains. Japan aimed to dominate East Asia and the Asia-Pacific , and by 1937 was at war with the Republic of China . In December 1941, Japan attacked American and British territories in Southeast Asia and the Central Pacific , including Pearl Harbor in Hawaii , which resulted in the US and the UK declaring war against Japan, and

7560-418: The Soviet Union and Mongolia . The Japanese doctrine of Hokushin-ron , which emphasised Japan's expansion northward, was favoured by the Imperial Army during this time. This policy would prove difficult to maintain in light of the Japanese defeat at Khalkin Gol in 1939, the ongoing Second Sino-Japanese War and ally Nazi Germany pursuing neutrality with the Soviets. Japan and the Soviet Union eventually signed

7680-575: The Soviet Union should be eliminated and aimed for the conquest of Ukraine , the Baltic states and Byelorussia . However, other senior German officials like Ribbentrop saw an opportunity to create a Euro-Asian bloc against the British Empire by inviting the Soviet Union into the Tripartite Pact. In November 1940, negotiations took place to determine if the Soviet Union would join the pact. The Soviets showed some interest but asked for concessions from Finland, Bulgaria, Turkey, and Japan that Germany considered unacceptable. On 18 December 1940, Hitler issued

7800-402: The US dropped the first atomic bombs on Hiroshima and Nagasaki on 6 and 9 August. Faced with an imminent invasion of the Japanese archipelago , the possibility of further atomic bombings, and the Soviet declaration of war against Japan and its invasion of Manchuria , Japan announced its unconditional surrender on 15 August and signed a surrender document on 2 September 1945 , marking

7920-424: The United Kingdom and France guaranteed their support for Polish independence ; when Italy conquered Albania in April 1939, the same guarantee was extended to the Kingdoms of Romania and Greece . Shortly after the Franco - British pledge to Poland, Germany and Italy formalised their own alliance with the Pact of Steel . Hitler accused the United Kingdom and Poland of trying to "encircle" Germany and renounced

8040-489: The United Kingdom attacked on 3   July in an attempt to prevent its seizure by Germany. The air Battle of Britain began in early July with Luftwaffe attacks on shipping and harbours . The German campaign for air superiority started in August but its failure to defeat RAF Fighter Command forced the indefinite postponement of the proposed German invasion of Britain . The German strategic bombing offensive intensified with night attacks on London and other cities in

8160-401: The United Kingdom. The Germans turned south against the weakened French army, and Paris fell to them on 14   June. Eight days later France signed an armistice with Germany ; it was divided into German and Italian occupation zones , and an unoccupied rump state under the Vichy Regime , which, though officially neutral, was generally aligned with Germany. France kept its fleet, which

8280-473: The United States was assisting China and the Western Allies, and had amended the Neutrality Act to allow "cash and carry" purchases by the Allies. In 1940, following the German capture of Paris, the size of the United States Navy was significantly increased . In September the United States further agreed to a trade of American destroyers for British bases . Still, a large majority of the American public continued to oppose any direct military intervention in

8400-414: The West in the Cold War by helping establish SEATO . In 1956, it became clearer that Plaek, allied to Phao, was losing to another influential group led by Sarit which consisted of "Sakdina" (royalties and royalists). Both Plaek and Phao intended to bring home Pridi Banomyong to clear his name from the mystery around the death of King Rama VIII. However, the US government disapproved, and they cancelled

8520-434: The Yellow River ; this manoeuvre bought time for the Chinese to prepare their defences at Wuhan , but the city was taken by October. Japanese military victories did not bring about the collapse of Chinese resistance that Japan had hoped to achieve; instead, the Chinese government relocated inland to Chongqing and continued the war. In the mid-to-late 1930s, Japanese forces in Manchukuo had sporadic border clashes with

8640-531: The abdicated King Prajadhipok were banned. His quotes appeared in newspapers, were plastered on billboards, and were repeated over the radio. Phibun immediately promoted Thai nationalism (to the point of ultranationalism ), and to support this policy, he launched a series of major reforms, known as the Thai Cultural Revolution , to increase the pace of modernisation in Thailand. His goal aimed to uplift

8760-541: The army headquarters in Lopburi . Khuang Aphaiwong replaced Phibun as prime minister, ostensibly to continue relations with the Japanese, but, in reality, to secretly assist the Free Thai Movement. At the war's end, Phibun was put on trial at Allied insistence on charges of having committed war crimes , mainly that of collaborating with the Axis powers . However, he was acquitted amid intense pressure as public opinion

8880-502: The capital Nanking in December 1937. After the fall of Nanking, tens or hundreds of thousands of Chinese civilians and disarmed combatants were murdered by the Japanese . In March 1938, Nationalist Chinese forces won their first major victory at Taierzhuang , but then the city of Xuzhou was taken by the Japanese in May. In June 1938, Chinese forces stalled the Japanese advance by flooding

9000-465: The children of Sang Phathanothai , his closest advisor, to China with the intention of establishing a backdoor channel for dialogue between China and Thailand. Sirin Phathanothai , aged eight, and her brother, aged twelve, were sent to be brought up under the assistants of Premier Zhou Enlai as his wards . Sirin later wrote The Dragon's Pearl , an autobiography telling her experiences growing up in

9120-500: The command of Field Marshal Sarit Thanarat , who had earlier sworn to be Phibun's most loyal subordinate. Sarit was supported by many royalists who wanted to regain a foothold, and there were rumours that the United States was "deeply involved" in the coup. Phibun was then forced into exile after the coup, first fleeing to Cambodia , but later settled in Japan after Sarit's new regime rejected his requests to allow him to return to Thailand. In 1960, Phibun briefly travelled to India to be

9240-403: The conflict well into 1941. In December 1940, Roosevelt accused Hitler of planning world conquest and ruled out any negotiations as useless, calling for the United States to become an " arsenal of democracy " and promoting Lend-Lease programmes of military and humanitarian aid to support the British war effort; Lend-Lease was later extended to the other Allies, including the Soviet Union after it

9360-652: The country's name from "Siam" to "Thailand", and promoted the Thai language . Phibun was ousted as prime minister by the National Assembly in 1944 and replaced by members of the Free Thai Movement , but returned to power after the Siamese coup d'état of 1947 , led by the Coup Group . Phibun aligned Thailand with anti-communism in the Cold War , entered the Korean War under the United Nations Command , and abandoned fascism for

9480-406: The country's official English name from "Siam" to "Thailand" at Wichitwathakan's urging. The name "Siam" was an exonym of unknown and probably foreign origin, which conflicted with Phibun's nationalist policies. In 1941, in the midst of World War II , Phibun decreed 1 January as the official start of the new year instead of the traditional Songkran date on 13 April. Phibun exploited

9600-515: The creation of a " New Roman Empire ". Adolf Hitler , after an unsuccessful attempt to overthrow the German government in 1923, eventually became the Chancellor of Germany in 1933 when Paul von Hindenburg and the Reichstag appointed him. Following Hindenburg's death in 1934, Hitler proclaimed himself Führer of Germany and abolished democracy, espousing a radical, racially motivated revision of

9720-739: The dissolution of the Austro-Hungarian, Ottoman, and Russian Empires. To prevent a future world war, the League of Nations was established in 1920 by the Paris Peace Conference . The organisation's primary goals were to prevent armed conflict through collective security, military, and naval disarmament , as well as settling international disputes through peaceful negotiations and arbitration. Despite strong pacifist sentiment after World War   I , irredentist and revanchist nationalism had emerged in several European states. These sentiments were especially marked in Germany because of

9840-648: The economic power of Siam's Teochew-Hoklo population and encouraged the Central Thai people to purchase as many Thai products as possible. In a speech in 1938, Luang Wichitwathakan, himself of one-quarter Chinese ancestry, followed Rama VI 's book Jews of the East in comparing the Teochew in Siam to the Jews in Germany, who at the time were harshly repressed. On 24 June 1939, Phibun changed

9960-667: The economy. The following year, Phibun and his military allies successfully crushed the Boworadet Rebellion , a royalist revolt led by Prince Boworadet . The new king, Ananda Mahidol , was still a child studying in Switzerland , and the Parliament appointed Colonel Prince Anuwatjaturong, Lieutenant Commander Prince Aditya Dibabha , and Chao Phraya Yommaraj (Pun Sukhum) as his regents . On 16 December 1938, Phibun replaced Phraya Phahon as Prime Minister of Thailand and as

10080-637: The end of May completed the German conquest of the Balkans. Partisan warfare subsequently broke out against the Axis occupation of Yugoslavia , which continued until the end of the war. In the Middle East in May, Commonwealth forces quashed an uprising in Iraq which had been supported by German aircraft from bases within Vichy-controlled Syria . Between June and July, British-led forces invaded and occupied

10200-508: The end of the war. World War II changed the political alignment and social structure of the world, and it set the foundation of international relations for the rest of the 20th century and into the 21st century. The United Nations was established to foster international cooperation and prevent conflicts, with the victorious great powers—China, France, the Soviet Union, the UK, and the US—becoming

10320-566: The first step of what its government saw as the country's right to rule Asia , staged the Mukden incident as a pretext to invade Manchuria and establish the puppet state of Manchukuo . China appealed to the League of Nations to stop the Japanese invasion of Manchuria. Japan withdrew from the League of Nations after being condemned for its incursion into Manchuria. The two nations then fought several battles, in Shanghai , Rehe and Hebei , until

10440-843: The former Chinese imperial capital of Peking after instigating the Marco Polo Bridge incident , which culminated in the Japanese campaign to invade all of China. The Soviets quickly signed a non-aggression pact with China to lend materiel support, effectively ending China's prior cooperation with Germany . From September to November, the Japanese attacked Taiyuan , engaged the Kuomintang Army around Xinkou , and fought Communist forces in Pingxingguan . Generalissimo Chiang Kai-shek deployed his best army to defend Shanghai , but after three months of fighting, Shanghai fell. The Japanese continued to push Chinese forces back, capturing

10560-512: The invasion of the Ethiopian Empire (also known as Abyssinia ) by the armed forces of the Kingdom of Italy ( Regno d'Italia ), which was launched from Italian Somaliland and Eritrea . The war resulted in the military occupation of Ethiopia and its annexation into the newly created colony of Italian East Africa ( Africa Orientale Italiana , or AOI); in addition it exposed the weakness of

10680-726: The latter enabling the strategic bombing of population centres and delivery of the only two nuclear weapons ever used in war. World War II was the deadliest conflict in history, resulting in 70 to 85 million deaths , more than half being civilians. Millions died in genocides , including the Holocaust of European Jews, as well as from massacres, starvation, and disease. Following the Allied powers' victory, Germany , Austria , Japan , and Korea were occupied, and war crimes tribunals were conducted against German and Japanese leaders . The causes of World War II included unresolved tensions in

10800-449: The military coup risked international disapproval. Pridi Phanomyong was persecuted but was aided by British and US intelligence officers, and thus managed to escape the country. On 8 April 1948, Phibun assumed the position of Prime Minister after the military forced Khuang out of office. Phibun's second premiership was notably different, abandoning the fascist styling and rhetoric that characterised his first premiership, and instead promoted

10920-479: The most powerful propaganda instruments of political power. In Italy, its main purpose was to promote nationalism and militarism , strengthen the unity and harmony of the state, and glorify the policy of ruralisation in Italy and abroad. As a consequence of the fascist leanings of Thai political leaders, Italian propaganda films including newsreels, documentaries, short films, and full-length feature films, such as Istituto Luce Cinecittà , were shown in Thailand during

11040-547: The national spirit and moral code of the nation and instil progressive tendencies and a newness into Thai life. A series of cultural mandates were issued by the government, which encouraged all Thais to salute the flag in public places, learn the new national anthem and use the standardised Thai language (not regional dialects or languages). People were encouraged to adopt Western-style attire as opposed to traditional clothing styles, and eat with Western-style utensils, such as forks and spoons , rather than with their hands as

11160-447: The permanent members of its security council . The Soviet Union and the United States emerged as rival superpowers , setting the stage for the Cold War . In the wake of European devastation, the influence of its great powers waned, triggering the decolonisation of Africa and Asia . Most countries whose industries had been damaged moved towards economic recovery and expansion . World War II began in Europe on 1 September 1939 with

11280-411: The plan. In February 1957, public opinion turned against Phibun at the end of his second term when his party was suspected of fraudulent practices during an election, including the intimidation of the opposition, buying votes, and electoral fraud . In addition, critics of Phibun accused him of a lack of respect for the Thai monarchy , as the anti- aristocratic prime minister had always sought to limit

11400-571: The political European map with the defeat of the Central Powers —including Austria-Hungary , Germany , Bulgaria , and the Ottoman Empire —and the 1917 Bolshevik seizure of power in Russia , which led to the founding of the Soviet Union. Meanwhile, the victorious Allies of World War I , such as France, Belgium, Italy, Romania, and Greece, gained territory, and new nation-states were created out of

11520-583: The port of Tobruk . By late March 1941, Bulgaria and Yugoslavia signed the Tripartite Pact ; however, the Yugoslav government was overthrown two days later by pro-British nationalists. Germany and Italy responded with simultaneous invasions of both Yugoslavia and Greece , commencing on 6 April 1941; both nations were forced to surrender within the month. The airborne invasion of the Greek island of Crete at

11640-466: The prominent foreign minister who had advocated continued resistance against the Japanese, was later sent to Tokyo as an ambassador. The United States considered Thailand to be a puppet state of Japan and refused to declare war on it. When the Allies were victorious, the United States blocked British efforts to impose a punitive peace. In 1944, as the Japanese neared defeat and the underground anti-Japanese Free Thai Movement steadily grew in strength,

11760-693: The remainder of Czechoslovakia and subsequently split it into the German Protectorate of Bohemia and Moravia and a pro-German client state , the Slovak Republic . Hitler also delivered an ultimatum to Lithuania on 20 March 1939, forcing the concession of the Klaipėda Region , formerly the German Memelland . Greatly alarmed and with Hitler making further demands on the Free City of Danzig ,

11880-536: The role of the monarchy to a constitutional minimum and had taken on religious functions that traditionally belonged to the monarch. For example, Phibun led the celebrations of the 2500th anniversary of Buddhism in 1956/57 instead of the King Bhumibol Adulyadej , who was openly critical of Phibun. On 16 September 1957, Phibun was eventually overthrown in a coup d'etat by members of the Royal Thai Army under

12000-458: The significant territorial, colonial, and financial losses imposed by the Treaty of Versailles . Under the treaty, Germany lost around 13 percent of its home territory and all its overseas possessions , while German annexation of other states was prohibited, reparations were imposed, and limits were placed on the size and capability of the country's armed forces . The German Empire was dissolved in

12120-494: The start or prelude to World War II. The exact date of the war's end also is not universally agreed upon. It was generally accepted at the time that the war ended with the armistice of 15 August 1945 ( V-J Day ), rather than with the formal surrender of Japan on 2 September 1945, which officially ended the war in Asia . A peace treaty between Japan and the Allies was signed in 1951. A 1990 treaty regarding Germany's future allowed

12240-575: The strong Maginot Line fortifications on the Franco-German border, Germany directed its attack at the neutral nations of Belgium , the Netherlands , and Luxembourg . The Germans carried out a flanking manoeuvre through the Ardennes region, which was mistakenly perceived by the Allies as an impenetrable natural barrier against armoured vehicles. By successfully implementing new Blitzkrieg tactics,

12360-623: The two wars became World War II in 1941. Other proposed starting dates for World War II include the Italian invasion of Abyssinia on 3 October 1935. The British historian Antony Beevor views the beginning of World War   II as the Battles of Khalkhin Gol fought between Japan and the forces of Mongolia and the Soviet Union from May to September 1939. Others view the Spanish Civil War as

12480-456: The war were not fulfilled in the peace settlement. From 1922 to 1925, the Fascist movement led by Benito Mussolini seized power in Italy with a nationalist, totalitarian , and class collaborationist agenda that abolished representative democracy, repressed socialist, left-wing, and liberal forces, and pursued an aggressive expansionist foreign policy aimed at making Italy a world power, promising

12600-475: The war. Germany annexed western Poland and occupied central Poland ; the Soviet Union annexed eastern Poland ; small shares of Polish territory were transferred to Lithuania and Slovakia . On 6 October, Hitler made a public peace overture to the United Kingdom and France but said that the future of Poland was to be determined exclusively by Germany and the Soviet Union. The proposal was rejected and Hitler ordered an immediate offensive against France, which

12720-503: The west halted the German advance for several days, but it was outflanked and encircled by the Wehrmacht . Remnants of the Polish army broke through to besieged Warsaw . On 17 September 1939, two days after signing a cease-fire with Japan , the Soviet Union invaded Poland under the supposed pretext that the Polish state had ceased to exist. On 27 September, the Warsaw garrison surrendered to

12840-473: The wet season and 480,000 ha (1,853 sq mi) in the dry season. In 1991, the Lower Mae Ping Dam ( 17°14′31″N 99°00′58″E  /  17.24194°N 99.01611°E  / 17.24194; 99.01611  ( Lower Mae Ping Dam ) ) was constructed 5 km (3 mi) downstream to create a lower reservoir for the one pumped-storage turbine that was installed. When constructed,

12960-687: The world order , and soon began a massive rearmament campaign . France, seeking to secure its alliance with Italy, allowed Italy a free hand in Ethiopia , which Italy desired as a colonial possession. The situation was aggravated in early 1935 when the Territory of the Saar Basin was legally reunited with Germany, and Hitler repudiated the Treaty of Versailles, accelerated his rearmament programme, and introduced conscription. The United Kingdom, France and Italy formed

13080-614: Was invaded by Germany. The United States started strategic planning to prepare for a full-scale offensive against Germany. At the end of September 1940, the Tripartite Pact formally united Japan, Italy, and Germany as the Axis powers . The Tripartite Pact stipulated that any country—with the exception of the Soviet Union—that attacked any Axis Power would be forced to go to war against all three. The Axis expanded in November 1940 when Hungary , Slovakia , and Romania joined. Romania and Hungary later made major contributions to

13200-511: Was a Chinese immigrant from Guangdong of Cantonese descent. However, the family was completely assimilated, being considered Central Thai people , since most of Chinese in Thailand are Teochew , Plaek did not pass the criteria for being considered Chinese as well, enabling him to successfully conceal and deny his Chinese roots. He studied in Buddhist temples before joining the Royal Military Academy ; upon graduation in 1914, he

13320-506: Was able to escape and swim back to shore when the Sri Ayutthaya was bombed by the air force, and with their hostage gone, the navy were forced to lay down their arms. "...tell your father [Pridi] that I want [him] to come back [and] help me work for the nation. I alone can no longer contest Sakdina." Plaek to one of Pridi's sons in June 1957. On 29 November 1951, the Silent Coup

13440-517: Was commissioned into the Royal Siamese Army as a second lieutenant in the artillery . Following World War I , he was sent to France to study artillery tactics at the École d'application d'artillerie . In 1928, as he rose in rank, he received the noble title Luang from King Prajadhipok , and became known as Luang Phibunsongkhram . He would later drop his Luang title but permanently adopted Phibunsongkhram as his surname. In 1932, Phibun

13560-401: Was customary in Thai culture at the time. Phibun saw these policies as necessary, in the interest of progressivism , to change Thailand's international image from that of an undeveloped country into a civilized and modern nation. Phibun's administration encouraged economic nationalism and espoused staunch anti-Teochew sentiment . Sinophobic policies were imposed by the government to reduce

13680-514: Was one of the leaders of the Royal Siamese Army branch of the People's Party ( Khana Ratsadon ), a political organization that staged a coup d'état which overthrew Siam's absolute monarchy and replaced it with a constitutional monarchy . Phibun, at the time a lieutenant colonel , quickly rose to prominence in the military as a "man-on-horseback". The 1932 coup was followed by the nationalization of several companies and increased state control of

13800-502: Was postponed until the spring of 1940 due to bad weather. After the outbreak of war in Poland, Stalin threatened Estonia , Latvia , and Lithuania with military invasion, forcing the three Baltic countries to sign pacts allowing the creation of Soviet military bases in these countries; in October 1939, significant Soviet military contingents were moved there. Finland refused to sign

13920-761: Was repulsed with heavy Italian casualties; the campaign ended within months with minor territorial changes. To assist Italy and prevent Britain from gaining a foothold, Germany prepared to invade the Balkans, which would threaten Romanian oil fields and strike against British dominance of the Mediterranean. In December 1940, British Empire forces began counter-offensives against Italian forces in Egypt and Italian East Africa . The offensives were successful; by early February 1941, Italy had lost control of eastern Libya, and large numbers of Italian troops had been taken prisoner. The Italian Navy also suffered significant defeats, with

14040-651: Was required to go through the bureaucracy of the League of Nations, which rendered it essentially toothless. The United States, concerned with events in Europe and Asia, passed the Neutrality Act in August of the same year. Hitler defied the Versailles and Locarno Treaties by remilitarising the Rhineland in March 1936, encountering little opposition due to the policy of appeasement . In October 1936, Germany and Italy formed

14160-579: Was staged by the Coup Group and it consolidated the military's hold on the country. It reinstated the Constitution of 1932 , which effectively eliminated the Senate , established a unicameral legislature composed equally of elected and government-appointed members, and allowed serving military officers to supplement their commands with important ministerial portfolios . In 1954 Phibun allied Thailand further with

14280-501: Was still favourable to him, as he was thought to have done his best to protect Thai interests. Phibun's alliance with Japan had Thailand take advantage of Japanese support to expand Thai territory into Malaya and Burma. In November 1947, Royal Thai Army units under the control of Phibun known as the Coup Group carried out the Siamese coup d'état of 1947 which forced then-Prime Minister Thawan Thamrongnawasawat to resign. The rebels installed Khuang Aphaiwong again as prime minister as

14400-613: Was the longest to date. Phibun was born Plaek on 14 July 1897 in Mueang Nonthaburi , Nonthaburi Province, in the Kingdom of Siam to durian farmers. His family began using the surname Khittasangkha ( Thai : ขีตตะสังคะ ) after a 1913 decree on surnames. He received his given name – meaning "strange" or "weird" in English – because of his unusual appearance as a child where his ears were positioned below his eyes, rather than above his eyes like others. Plaek's paternal grandfather

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