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92-658: The main purposes of the dam would be to produce 1,500 MW of hydro-electricity and to manage flooding. If completed, the 230-metre (750 ft) high Bekhme Dam will be the largest in Iraq. Construction on the dam began in 1979 and was halted during the Iran–Iraq War . Construction started again in 1988 and halted in 1990, prior to the Gulf War . In post-2003 Iraq, the Kurdistan Regional Government began efforts to rebuild

184-741: A Pan-Islamic force, in contrast to Iraq's Arab nationalism . Despite Iraq's goal of regaining the Shatt al-Arab , the Iraqi government initially seemed to welcome the Iranian Revolution , which overthrew Shah Mohammad Reza Pahlavi , who was seen as a common enemy. There were frequent clashes along the Iran–Iraq border throughout 1980, with Iraq publicly complaining of at least 544 incidents and Iran citing at least 797 violations of its border and airspace. Ayatollah Ruhollah Khomeini called on Iraqis to overthrow

276-573: A ceasefire brokered by the United Nations Security Council . In total, around 500,000 people were killed during the Iran–Iraq War, with Iran bearing the larger share of the casualties, excluding the tens of thousands of civilians killed in the concurrent Anfal campaign that targeted Iraqi Kurdistan . The end of the conflict resulted in neither reparations nor border changes, and the combined financial losses suffered by both combatants

368-592: A crackdown to restore Saddam's control. The execution of Iraq's most senior Ayatollah, and "reports that Saddam's secret police had raped al-Sadr's sister in al-Sadr's presence, had set his beard alight, and then dispatched him with a nail gun" caused outrage throughout the Islamic world, especially among Iraqi Shias. The Shias' repeated calls for the overthrow of the Ba'ath party and the support they allegedly received from Iran's new government led Saddam to increasingly perceive Iran as

460-581: A full-scale invasion of Iran on 22 September 1980. The Iraqi Air Force launched surprise air strikes on ten Iranian airfields with the objective of destroying the Iranian Air Force , mimicking the Israeli Air Force in the Six-Day War . The attack failed to damage Iranian Air Force significantly: it damaged some of Iran's airbase infrastructure, but failed to destroy a significant number of aircraft:

552-444: A group of two or three low-flying F-4 Phantoms could hit targets almost anywhere in Iraq. Meanwhile, Iraqi air attacks on Iran were repulsed by Iran's F-14 Tomcat interceptor fighter jets, using Phoenix missiles , which downed a dozen of Iraq's Soviet-built fighters in the first two days of battle. The Iranian regular military, police forces, volunteer Basij, and Revolutionary Guards all conducted their operations separately; thus,

644-593: A large scale." Days before the Iraqi invasion and in the midst of rapidly escalating cross-border skirmishes, Iraqi military intelligence again reiterated on 14 September that "the enemy deployment organization does not indicate hostile intentions and appears to be taking on a more defensive mode." Iraq soon after expropriated the properties of 70,000 civilians believed to be of Iranian origin and expelled them from its territory. Many, if not most, of those expelled were in fact Arabic-speaking Iraqi Shias who had little to no family ties with Iran. This caused tensions between

736-484: A lasting impact on the dynamics of the conflict. In April 1969, Iran abrogated the 1937 treaty over the Shatt al-Arab and Iranian ships stopped paying tolls to Iraq when they used the Shatt al-Arab. The Shah argued that the 1937 treaty was unfair to Iran because almost all river borders around the world ran along the thalweg , and because most of the ships that used the Shatt al-Arab were Iranian. Iraq threatened war over

828-553: A more defensive mode". Some scholars writing prior to the opening of formerly classified Iraqi archives, such as Alistair Finlan, argued that Saddam was drawn into a conflict with Iran due to the border clashes and Iranian meddling in Iraqi domestic affairs. Finlan stated in 2003 that the Iraqi invasion was meant to be a limited operation in order to send a political message to the Iranians to keep out of Iraqi domestic affairs, whereas Kevin M. Woods and Williamson Murray stated in 2014 that

920-685: A pretext. A successful invasion of Iran would enlarge Iraq's petroleum reserves and make Iraq the region's dominant power. With Iran engulfed in chaos, an opportunity for Iraq to annex the oil-rich Khuzestan Province materialized. In addition, Khuzestan's large ethnic Arab population would allow Saddam to pose as a liberator for Arabs from Persian rule. Fellow Gulf states such as Saudi Arabia and Kuwait (despite being hostile to Iraq) encouraged Iraq to attack, as they feared that an Islamic revolution would take place within their own borders. Certain Iranian exiles also helped convince Saddam that if he invaded,

1012-507: A stretch of the Shatt al-Arab river spanning several miles. Iraq launched a full-scale invasion of Iran on 22 September 1980. The Iraqi Air Force launched surprise air strikes on ten Iranian airfields with the objective of destroying the Iranian Air Force . The attack failed to cripple the Iranian Air Force: while it damaged some of Iran's airbase infrastructure, it did not destroy a significant number of aircraft. The Iraqi Air Force

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1104-523: A surprise airstrike against the Iranian air force's infrastructure prior to the main invasion. It is widely accepted among scholars that Iraq was seeking to annex, or at least to establish suzerainty over, Iran's Khuzestan province , but Saddam Hussein publicly denied this in November 1980. On 10 September 1980, Iraq forcibly reclaimed territories in Zain al-Qaws and Saif Saad that it had been promised under

1196-479: A threat that, if ignored, might one day overthrow him; he thus used the attacks as pretext for attacking Iran that September, though skirmishes along the Iran–Iraq border had already become a daily event by May that year. Despite Iran's bellicose rhetoric, Iraqi military intelligence reported in July 1980 that "it is clear that, at present, Iran has no power to launch wide offensive operations against Iraq, or to defend on

1288-519: A weakened Iran's consolidation of the Islamic Revolution , forcibly reclaimed territories in Zain al-Qaws and Saïf Saad ; these had been promised to Iraq under the terms of the 1975 Algiers Agreement , but were never actually transferred. Both Iran and Iraq later declared the treaty as null and void, doing so on 14 September and 17 September, respectively. As a result, the only outstanding dispute along

1380-457: A whole. The Iraqi government sought to take control of the entire Shatt al-Arab in a rapid and decisive military campaign, believing that Iraq's victory in the broader conflict would humiliate Iran and lead to Khomeini's downfall, or, at the very least, thwart the new Iranian government's attempts to spread Khomeinism throughout the Muslim world . Saddam had also aspired to annex Khuzestan and saw

1472-701: Is believed to have exceeded US$ 1 trillion. There were a number of proxy forces operating for both countries: Iraq and the pro-Iraqi Arab separatist militias in Iran were most notably supported by the National Council of Resistance of Iran ; whereas Iran re-established an alliance with the Iraqi Kurds , being primarily supported by the Kurdistan Democratic Party and the Patriotic Union of Kurdistan . During

1564-522: The First Gulf War , was an armed conflict between Iran and Iraq that lasted from September 1980 to August 1988. Active hostilities began with the Iraqi invasion of Iran and lasted for nearly eight years, until the acceptance of United Nations Security Council Resolution 598 by both sides. Iraq's primary rationale for the attack against Iran cited the need to prevent Ruhollah Khomeini —who had spearheaded

1656-504: The Iranian Revolution in 1979—from exporting the new Iranian ideology to Iraq. There were also fears among the Iraqi leadership of Saddam Hussein that Iran, a theocratic state with a population predominantly composed of Shia Muslims , would exploit sectarian tensions in Iraq by rallying Iraq's Shia majority against the Baʽathist government , which was officially secular and dominated by Sunni Muslims . Iraq also wished to replace Iran as

1748-535: The Iran–Iraq War , and lasted until 5 December 1980. Ba'athist Iraq believed that Iran would not respond effectively due to internal socio-political turmoil caused by the country's Islamic Revolution one year earlier. However, Iraqi troops faced fierce Iranian resistance, which stalled their advance into western Iran . In two months, the invasion came to a halt after Iraq occupied more than 25,900 square kilometres (10,000 sq mi) of Iranian territory. On 10 September 1980, Iraq, hoping to take advantage of

1840-452: The Iran–Iraq border at the time of the Iraqi invasion on 22 September was the question of whether Iranian ships would fly Iraqi flags and pay navigation fees to Iraq while sailing through a stretch of the Shatt al-Arab spanning several kilometres. On 22 September, Iraqi aircraft pre-emptively bombarded ten Iranian airfields in an ultimately unsuccessful attempt to gain aerial superiority on

1932-508: The Iraqis and Arabs everywhere, we tell those Persian cowards and dwarfs who try to avenge al-Qadisiyah that the spirit of al-Qadisiyah as well as the blood and honor of the people of al-Qadisiyah who carried the message on their spearheads are greater than their attempts. In 1979–1980, anti-Ba'ath riots arose in the Iraq's Shia areas by groups who were working toward an Islamic revolution in their country. Saddam and his deputies believed that

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2024-615: The Islamic Dawa Party a capital offense at the end of March, Shia militants assassinated 20 Ba'ath officials, and Deputy Prime Minister Tariq Aziz was almost assassinated on 1 April; Aziz survived, but 11 students were killed in the attack. Three days later, the funeral procession being held to bury the students was bombed. Iraqi Information Minister Latif Nusseif al-Jasim also barely survived assassination by Shia militants. In April 1980, Grand Ayatollah Muhammad Baqir al-Sadr and his sister Amina al-Sadr were executed as part of

2116-520: The Muslim conquest of Persia while promoting his country's position against Iran in the context of a looming war. On 2 April 1980, during a visit to al-Mustansiriya University in the city of Baghdad , he drew parallels to the 7th-century Battle of al-Qadisiyyah , in which the Rashidun Caliphate secured a decisive victory over the Sasanian Empire : In your name, brothers, and on behalf of

2208-486: The Osirak nuclear reactor near Baghdad. By 1 October, Baghdad had been subjected to eight air attacks. In response, Iraq launched aerial strikes against Iranian targets. The people of Iran, rather than turning against their still-weak Islamic Republic, rallied around their country. An estimated 200,000 fresh troops had arrived at the front by November, many of them ideologically committed volunteers. Though Khorramshahr

2300-561: The Zagros Mountains , and were able to block the traditional Tehran–Baghdad invasion route by securing territory forward of Qasr-e Shirin , Iran. On the northern front, the Iraqis attempted to establish a strong defensive position opposite Suleimaniya to protect the Iraqi Kirkuk oil complex . Iraqi hopes of an uprising by the ethnic Arabs of Khuzestan failed to materialise, as most of

2392-741: The pan-Arabism espoused by Iraq's Ba'athists. Saddam's primary interest in war may have stemmed from his desire to right the supposed "wrong" of the Algiers Agreement , in addition to finally achieving his desire of annexing Khuzestan and becoming the regional superpower. Saddam's goal was to replace Egypt as the "leader of the Arab world" and to achieve hegemony over the Persian Gulf. He saw Iran's increased weakness due to revolution, sanctions, and international isolation. Saddam had invested heavily in Iraq's military, buying large amounts of weaponry from

2484-438: The 1975 Algiers Agreement null and void... This river [Shatt al-Arab]...must have its Iraqi-Arab identity restored as it was throughout history in name and in reality with all the disposal rights emanating from full sovereignty over the river...We in no way wish to launch war against Iran. Despite Saddam's claim that Iraq did not want war with Iran, the next day his forces proceeded to attack Iranian border posts in preparation for

2576-662: The Arab revolts, the Revolutionary Guards would be drawn out of Tehran, leading to a counter-revolution in Iran that would cause Khomeini's government to collapse and thus ensure Iraqi victory. However, rather than turning against the revolutionary government as experts had predicted, Iran's people (including Iranian Arabs) rallied in support of the country and put up a stiff resistance. By September, skirmishes between Iran and Iraq were increasing in number. Iraq began to grow bolder, both shelling and launching border incursions into disputed territories . Malovany describes

2668-655: The Armed Forces, second only to Saddam Hussein. In this position, he played a crucial role in rebuilding and modernizing the Iraqi military. Though the Iraqi air invasion surprised the Iranians, the Iranian air force retaliated the day after with a large-scale attack against Iraqi air bases and infrastructure in Operation Kaman 99 . Groups of F-4 Phantom and F-5 Tiger fighter jets attacked targets throughout Iraq, such as oil facilities, dams, petrochemical plants, and oil refineries, and included Mosul Airbase , Baghdad, and

2760-528: The Ba'ath government, which was received with considerable anger in Baghdad. On 17 July 1979, despite Khomeini's call, Saddam gave a speech praising the Iranian Revolution and called for an Iraqi–Iranian friendship based on non-interference in each other's internal affairs. When Khomeini rejected Saddam's overture by calling for Islamic revolution in Iraq, Saddam was alarmed. Iran's new Islamic administration

2852-477: The Bekhme Dam. The Bekhme Dam was planned in the 1950s with a preliminary study done by Harza Engineering Co. , and in 1979 and through the early 1980s the project was redesigned by EPDC of Japan. Construction was assigned to a consortium of Turkish-Yugoslavian firms ( ENKA Hidrogradnja and Energoprojekt ). Construction on the project started in 1987 with access roads, residential camps, construction facilities and

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2944-429: The Iranian move, but on 24 April 1969, an Iranian tanker escorted by Iranian warships ( Joint Operation Arvand ) sailed down the Shatt al-Arab, and Iraq—being the militarily weaker state—did nothing. The Iranian abrogation of the 1937 treaty marked the beginning of a period of acute Iraqi–Iranian tension that would see significant bloodshed and was to last until the Algiers Agreement of 1975 . The relationship between

3036-485: The Iraqi Air Force was only able to strike in depth with a few MiG-23BN , Tu-22 , and Su-20 aircraft. Three MiG-23s managed to attack Tehran, striking its airport , but destroyed only a few aircraft. The next day, Iraq launched a ground invasion along a front measuring 644 km (400 mi) in three simultaneous attacks. Of Iraq's six divisions that were invading by ground, four were sent to Khuzestan, which

3128-504: The Iraqi Army had "liberated" all disputed territories within Iran. It should be carefully noted that Malovany, an Israeli ex-intelligence analyst writing years later, said the enclaves were not completely seized until 21 September. With the conclusion of the "liberating operations", on 17 September, in a statement addressed to Iraq's parliament, Saddam stated: The frequent and blatant Iranian violations of Iraqi sovereignty...have rendered

3220-560: The Iraqi Army's seizure of the Zayn al-Qaws enclave, near Khanaqin (by 6th Armoured Division , 2nd Corps); the Saif Sa'ad enclave ( 10th Armoured Division ) and the Maysan enclave between Shib and Fakkeh ( 1st Mechanised Division , 3rd Corps). Iran responded by shelling several Iraqi border towns and posts, though this did little to alter the situation on the ground. By 10 September, Saddam declared that

3312-416: The Iraqi advance, though not completely halting it. Meanwhile, Iraqi air attacks on Iran were repelled by Iran's F-14A Tomcat interceptor fighter jets, using AIM-54A Phoenix missiles, which downed a dozen of Iraq's Soviet-built fighters in the first two days of battle. The Iranian regular military, police forces, volunteer Basij, and Revolutionary Guards all conducted their operations separately; thus,

3404-599: The Iraqi invading forces did not face coordinated resistance. However, on 24 September, the Iranian Navy attacked Basra, Iraq , destroying two oil terminals near the Iraqi port Faw , which reduced Iraq's ability to export oil. The Iranian ground forces (primarily consisting of the Revolutionary Guard) retreated to the cities, where they set up defences against the invaders. On 30 September, Iran's air force launched Operation Scorch Sword , striking and badly damaging

3496-604: The Iraqi invading forces did not face coordinated resistance. However, on 24 September, the Iranian Navy attacked Basra , Iraq, destroying two oil terminals near the Iraqi port of Al-Faw , which reduced Iraq's ability to export oil. The Iranian ground forces, primarily consisting of the Revolutionary Guard, retreated to the cities, where they set up defences against the invaders. On 30 September, Iran's air force launched Operation Scorch Sword , striking and badly damaging

3588-565: The Iraqis had were over the Islamic Republic of Iran Air Force (formerly the Imperial Iranian Air Force ). Despite the purge of several key pilots and commanders, as well as the lack of spare parts, the air force showed its power during local uprisings and rebellions. They were also active after the failed U.S. attempt to rescue its hostages , Operation Eagle Claw . Based on these observations, Iraq's leaders decided to carry out

3680-773: The Iraqis were repelled. On 14 October, the Iraqis launched a second offensive. The Iranians launched a controlled withdrawal from the city, street by street. By 24 October, most of the city was captured, and the Iranians evacuated across the Karun River . Some partisans remained, and fighting continued until 10 November. Though the Iraqi air invasion surprised the Iranians, the Iranian air force retaliated with an attack against Iraqi military bases and infrastructure in Operation Kaman 99 ( Bow 99). Groups of F-4 Phantom and F-5 Tiger fighter jets attacked targets throughout Iraq, such as oil facilities, dams, petrochemical plants, and oil refineries, and included Mosul Airbase , Baghdad , and

3772-466: The Iraqis. They were subordinate to the Revolutionary Guards, and they made up most of the manpower that was used in the Revolutionary Guard's attacks. Stephen Pelletiere wrote in his 1992 book The Iran–Iraq War: Chaos in a Vacuum : The human wave has been largely misconstrued both by the popular media in the West and by many scholars. The Iranians did not merely assemble masses of individuals, point them at

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3864-451: The Islamic Revolution as an opportunity to do so, seeking to increase his country's prestige and power in the Arab world. To this end, his administration hoped that Iraq, as an Arab-majority country, could successfully exploit Arab separatism in Khuzestan to undermine Iran from within. In practice, these objectives failed to materialize and the majority of Iranian Arabs were indifferent to

3956-520: The Kirkuk oil refinery. Iraq was taken by surprise at the strength of the retaliation, as Iran took few losses while the Iraqis took heavy defeats and economic disruption. The Iranian force of AH-1J SeaCobra helicopter gunships began attacks on the advancing Iraqi divisions, along with F-4 Phantoms armed with Maverick missiles ; they destroyed numerous armoured vehicles and impeded the Iraqi advance, though not completely halting it. Iran had discovered that

4048-479: The Kirkuk oil refinery. Iraq was taken by surprise at the strength of the retaliation, which caused the Iraqis heavy losses and economic disruption, but the Iranians took heavy losses as well as losing many aircraft and aircrews to Iraqi air defenses. Iranian Army Aviation 's AH-1 Cobra helicopter gunships began attacks on the advancing Iraqi divisions, along with F-4 Phantoms armed with AGM-65 Maverick missiles; they destroyed numerous armoured vehicles and impeded

4140-455: The Soviet Union and France. Between 1973 and 1980 alone, Iraq purchased an estimated 1,600 tanks and APCs and over 200 Soviet-made aircraft. By 1980, Iraq possessed 242,000 soldiers, second only to Egypt in the Arab world, 2,350 tanks and 340 combat aircraft. Watching the disintegration of the powerful Iranian army that frustrated him in 1974–1975, he saw an opportunity to attack, using

4232-426: The Soviet Union and France. Between 1973 and 1980 alone, Iraq purchased an estimated 1,600 tanks and APCs and over 200 Soviet-made aircraft. By 1980, Iraq possessed 242,000 soldiers (second only to Egypt in the Arab world), 2,350 tanks and 340 combat aircraft. Watching the powerful Iranian army that frustrated him in 1974–1975 disintegrate, he saw an opportunity to attack, using the threat of Islamic Revolution as

4324-565: The area. As early as July 2007, the Kurdistan Regional Government has expressed interest in finishing the Bekhme Dam in order to produce hydro-electricity and store needed water. However, with a drought in Iraq, in 2008 the Government of Iraq expressed concern with the Kurdistan Regional Government over dam construction that may lead to water shortages in southern Iraq. In addition, around 20,000 people would be relocated along with

4416-579: The army being more integrated as a part of the regime by the war's end. Meanwhile, a new paramilitary organisation gained prominence in Iran, the Islamic Revolutionary Guard Corps . Created to protect the new regime and serve as a counterbalance to the army, the Revolutionary Guards (IRGC) had been trained to act only as a militia and struggled to adapt as needed following the Iraqi invasion, initially refusing to fight alongside

4508-495: The army. These purges resulted in a drastic decline in the Iranian military's operational capacities. On the eve of the revolution in 1978, international experts in military science had assessed that Iran's armed forces were the fifth most powerful in the world. However, by the eve of war with Iraq, the recently formidable Iranian army was in many crucial ways a shell of its former self, having been badly weakened by losses in experienced personnel. The desertion rate had reached 60%,

4600-491: The balance of evidence suggests Saddam was seeking "a convenient excuse for war" in 1980. On 8 March 1980, Iran announced it was withdrawing its ambassador from Iraq, downgraded its diplomatic ties to the charge d'affaires level, and demanded that Iraq do the same. The following day, Iraq declared Iran's ambassador persona non grata , and demanded his withdrawal from Iraq by 15 March. In Iran, severe officer purges, including numerous executions ordered by Sadegh Khalkhali ,

4692-448: The battlefield. On the next day, Iraqi troops crossed the international border in strength and advanced into Iran in three simultaneous thrusts along a front of approximately 644 kilometres (400 mi). Of Iraq's six divisions that were invading by land, four were sent to Iran's oil-rich Khuzestan in order to cut off Iranian access to the Shatt al-Arab and establish a territorial security zone. Iraqi president Saddam Hussein presented

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4784-501: The central front, the Iraqis occupied Mehran , advanced towards the foothills of the Zagros Mountains , and were able to block the traditional Tehran–Baghdad invasion route by securing territory forward of Qasr-e Shirin, Iran . Two of the four Iraqi divisions which invaded Khuzestan, one mechanised and one armoured, operated near the southern end and began a siege of the strategically important port cities of Abadan and Khorramshahr . The other two divisions, both armoured, secured

4876-649: The conflict, Iraq received an abundance of financial, political, and logistical aid from the United States , the United Kingdom , the Soviet Union , France , Italy , Yugoslavia , and the overwhelming majority of Arab countries . While Iran was comparatively isolated to a large degree, it received a significant amount of aid from Syria , Libya , China , North Korea , Israel , Pakistan , and South Yemen . The conflict has been compared to World War I in terms of

4968-537: The crossing points around the Karkheh and Karoun Rivers were undermanned and that the rivers could be easily crossed. Iraqi intelligence was also informed that the Iranian forces in Khuzestan Province , which consisted of two divisions prior to the revolution, now only consisted of several ill-equipped and under-strength battalions . Only a handful of company -sized tank units remained operational. The only qualms

5060-405: The dam, augmented by a plunge pool structure. A system of drainage tunnels was excavated into the left and right abutments at the foot of the main dam. The Bekhme Dam is designed with a central clay core, two upstream and downstream filter zones, and rockfill shoulders (limestone). The upstream and downstream faces of the dam are designed with gradients of 1 vertical to 2.5 horizontal. The dam project

5152-615: The development of quarries and borrow areas. Tunneling and bulk excavation works started in 1988. The works were halted in late 1990 after the UN sanctions due to Iraq's invasion of Kuwait, and with the onset of the Gulf War, as well as consequential poor security environment. By June 1990, the first stage of the construction was complete, the diversion of the Great Zab, facilitated by an incomplete 45-metre (148 ft) high clay core rockfill cofferdam, which

5244-409: The eastern bank of the Shatt al-Arab that it had ceded to Iran in the 1975 Algiers Agreement . Iraqi support for Arab separatists in Iran increased following the outbreak of hostilities; Saddam disputedly may have wished to annex Iran's Arab-majority Khuzestan province . While the Iraqi leadership had hoped to take advantage of Iran's post-revolutionary chaos and expected a decisive victory in

5336-422: The enemy, and order a charge. The waves were made up of the 22-man squads mentioned above [in response to Khomeini's call for the people to come to Iran's defense, each mosque organized 22 volunteers into a squad]. Each squad was assigned a specific objective. In battle, they would surge forward to accomplish their missions, and thus gave the impression of a human wave pouring against enemy lines. Despite neglect by

5428-420: The ethnic Arabs remained loyal to Iran. The Iraqi troops advancing into Iran in 1980 were described by Patrick Brogan as "badly led and lacking in offensive spirit". The first known chemical weapons attack by Iraq on Iran probably took place during the fighting around Susangerd. Adnan Khayr Allah served as Iraqi Minister of Defence throughout the Iran–Iraq War, and was appointed Deputy Supreme Commander of

5520-515: The face of a severely weakened Iran, the Iraqi military only made progress for three months, and by December 1980, the Iraqi invasion had stalled. The Iranian military began to gain momentum against the Iraqis and regained all lost territory by June 1982. After pushing Iraqi forces back to the pre-war border lines, Iran rejected United Nations Security Council Resolution 514 and launched an invasion of Iraq. The subsequent Iranian offensive within Iraqi territory lasted for five years, with Iraq taking back

5612-593: The fighting around Susangerd. On 22 September, a prolonged battle began in the city of Khorramshahr, eventually leaving 7,000 dead on each side. Reflecting the bloody nature of the struggle, Iranians came to call Khorramshahr "City of Blood" ( خونین شهر , Khunin shahr ). The battle began with Iraqi air raids against key points and mechanised divisions advancing on the city in a crescent-like formation. They were slowed by Iranian air attacks and Revolutionary Guard troops with recoilless rifles , rocket-propelled grenades , and Molotov cocktails . The Iranians flooded

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5704-456: The fledgling Islamic republic would quickly collapse. In particular, Saddam was assured of Saudi support for an invasion of Iran during his August 1980 visit to Saudi Arabia. In 1979–1980, Iraq was the beneficiary of an oil boom that saw it take in US$ 33 ;billion, which allowed the government to invest heavily in both civilian and military projects. On several occasions, Saddam alluded to

5796-402: The four Iraqi divisions, one mechanised and one armoured, operated near the southern end and began a siege of the strategically important port cities of Abadan and Khorramshahr . The two armoured divisions secured the territory bounded by the cities of Khorramshahr , Ahvaz , Susangerd , and Musian . On the central front, the Iraqis occupied Mehran , advanced towards the foothills of

5888-530: The governments of Iran and Iraq briefly improved in 1978, when Iranian agents in Iraq discovered plans for a pro-Soviet coup d'état against Iraq's government. When informed of this plot, Saddam ordered the execution of dozens of his army's officers, and in a sign of reconciliation, expelled from Iraq Ruhollah Khomeini , an exiled leader of clerical opposition to the Shah. Tensions between Iraq and Iran were fuelled by Iran's Islamic revolution and its appearance of being

5980-492: The initiative in mid-1988 and subsequently launching a series of major counter-offensives that ultimately led to the conclusion of the war in a stalemate. The eight years of war-exhaustion, economic devastation, decreased morale, military stalemate, inaction by the international community towards the use of weapons of mass destruction by Iraqi forces on Iranian soldiers and civilians , as well as increasing Iran–United States military tensions all culminated in Iran's acceptance of

6072-462: The invasion as a strategically defensive measure to blunt the edge of Iranian politician Ruhollah Khomeini , who had risen to power as Iran's " Supreme Leader " and was attempting to export the Islamic Revolution to the Arab world . Saddam, as a secularist and an Arab nationalist , perceived Iran's Shia Islamism as an immediate and existential threat to his Ba'ath Party and thereby to Iraqi society as

6164-425: The marsh areas around the city, forcing the Iraqis to traverse through narrow strips of land. Iraqi tanks launched attacks with no infantry support, and many tanks were lost to Iranian anti-tank teams. However, by 30 September, the Iraqis had managed to clear the Iranians from the outskirts of the city. The next day, the Iraqis launched infantry and armoured attacks into the city. After heavy house-to-house fighting ,

6256-1014: The nearly-complete Osirak Nuclear Reactor near Baghdad. By 1 October, Baghdad had been subjected to eight air attacks. In response, Iraq launched aerial strikes against Iranian targets. The mountainous border between Iran and Iraq made a deep ground invasion almost impossible, and air strikes were used instead. The invasion's first waves were a series of air strikes targeted at Iranian airfields. Iraq also attempted to bomb Tehran, Iran's capital and command centre, into submission. Iraqi invasion of Iran lraqi short-term operational success [REDACTED] Iranian Armed Forces [REDACTED] Iraqi Armed Forces Iraqi invasion of Iran (1980) Stalemate (1981) Iranian offensives to free Iranian territory (1981–82) Iranian offensives in Iraq (1982–84) Iranian offensives in Iraq (1985–87) Final stages (1988) Tanker War International incidents The Iraqi invasion of Iran began on 22 September 1980, sparking

6348-426: The new Revolutionary Court judge, and shortages of spare parts for Iran's American and British-made equipment had crippled Iran's once-mighty military . Between February and September 1979, Iran's government executed 85 senior generals and forced all major-generals and most brigadier-generals into early retirement. By September 1980, the revolutionary government had purged some 12,000 officers of all levels from

6440-437: The new government's downfall, or at least end Iran's calls for his overthrow. Of Iraq's six divisions that invaded by ground, four were sent to Khuzestan, which was located near the border's southern end, to cut off the Shatt al-Arab from the rest of Iran and to establish a territorial security zone. The other two divisions invaded across the northern and central part of the border to prevent an Iranian counter-attack. Two of

6532-487: The new regime, at the outset of the conflict, Iran still had at least 1,000 operational tanks and several hundred functional aircraft and could cannibalize equipment to procure spare parts. Continuous sanctions greatly limited Iran from acquiring many additional heavy weapons, including tanks and aircraft. In addition, the area around the Shatt al-Arab posed no obstacle for the Iraqis, as they possessed river crossing equipment. Iraq correctly deduced that Iran's defences at

6624-416: The officer corps was devastated and its most highly skilled soldiers and aviators had been exiled, imprisoned, or executed. When the invasion occurred, many pilots and officers were released from prison, or had their executions commuted to combat the Iraqis. Throughout the war, Iran never managed to fully recover from this flight of human capital . Many junior officers were promoted to generals, resulting in

6716-426: The planned invasion. Iraq's 7th Mechanised and 4th Infantry Divisions attacked the Iranian border posts leading to the cities of Fakkeh and Bostan , opening the route for future armoured thrusts into Iran. Weakened by internal chaos, Iran was unable to repel the attacks; which in turn led to Iraq becoming more confident in its military edge over Iran and prompting them to believe in a quick victory. Iraq launched

6808-460: The power player in the Persian Gulf , which was not seen as an achievable objective prior to the Islamic Revolution because of Pahlavi Iran 's economic and military superiority as well as its close relationships with the United States and Israel . The Iran–Iraq War followed a long-running history of territorial border disputes between the two states , as a result of which Iraq planned to retake

6900-1062: The probable flooding of the stone age Shanidar Cave and the 11th century BC village Zawi Chemi Shanidar . Despite this, the need for water storage in Iraq is important and in August 2008, US$ 33 million was spent on preparatory works for continued construction. The Bekhme Dam's final cost is estimated as US$ 2.6 billion. Iran%E2%80%93Iraq War Start of war: 110,000–215,000 soldiers KDP: 45,000 Peshmerga (1986–88) PUK: 12,000 Peshmerga (1986–88) Start of war: 200,000–210,000 soldiers KDPI: 30,000 Peshmerga (1980–83) MEK: 15,000 fighters (1981–83, 87–88) Military dead: 200,000–600,000 Military dead: 105,000–500,000 Iraqi invasion of Iran (1980) Stalemate (1981) Iranian offensives to free Iranian territory (1981–82) Iranian offensives in Iraq (1982–84) Iranian offensives in Iraq (1985–87) Final stages (1988) Tanker War International incidents The Iran–Iraq War , also known as

6992-518: The regular army, resulting in many defeats. It was not until 1982 that the two groups began carrying out combined operations. An additional paramilitary militia was founded in response to the invasion, the "Army of 20 Million", commonly known as the Basij . The Basij were poorly armed and had members as young as 12 and as old as 70. They often acted in conjunction with the Revolutionary Guard, launching so-called human wave attacks and other campaigns against

7084-436: The riots had been inspired by the Iranian Revolution and instigated by Iran's government. On 10 March 1980, when Iraq declared Iran's ambassador persona non-grata , and demanded his withdrawal from Iraq by 15 March, Iran replied by downgrading its diplomatic ties to the charge d'affaires level, and demanded that Iraq withdraw their ambassador from Iran. In April 1980, in response to the Ba'ath Party declaring membership in

7176-408: The southern portion of the country. When Iraq laid siege to Abadan and dug its troops in around the city, it was unable to blockade the port, which allowed Iran to resupply Abadan by sea. Iraq's strategic reserves had been depleted, and by now it lacked the power to go on any major offensives until nearly the end of the war. On 7 December, Hussein announced that Iraq was going on the defensive. By

7268-471: The supposed "wrong" of the Algiers Agreement , in addition to finally achieving his desire of becoming the regional superpower. Saddam's goal was to supplant Egypt as the "leader of the Arab world" and to achieve hegemony over the Persian Gulf. He saw Iran's increased weakness due to revolution, sanctions, and international isolation. Saddam had invested heavily in Iraq's military since his defeat against Iran in 1975, buying large amounts of weaponry from

7360-495: The tactics used by both sides, including large-scale trench warfare with barbed wire stretched across fortified defensive lines, manned machine-gun posts, bayonet charges , Iranian human wave attacks , Iraq's extensive use of chemical weapons , and deliberate attacks on civilian targets. The discourses on martyrdom formulated in the Iranian Shia Islamic context led to the widespread usage of human wave attacks and thus had

7452-410: The terms of the 1975 Algiers Agreement but that Iran had never handed over, leading to both Iran and Iraq declaring the treaty null and void, on 14 September and 17 September, respectively. As a result, the only outstanding border dispute between Iran and Iraq at the time of the Iraqi invasion of 22 September was the question of whether Iranian ships would fly Iraqi flags and pay Iraq navigation fees for

7544-447: The territory bounded by the cities of Khorramshahr , Ahvaz , Susangerd , and Musian . Iraqi hopes of an uprising by the ethnic Arabs of Khuzestan failed to materialise, as most of the ethnic Arabs remained loyal to Iran. The Iraqi troops advancing into Iran in 1980 were described by Patrick Brogan as "badly led and lacking in offensive spirit". The first known chemical weapons attack by Iraq on Iran probably took place during

7636-534: The threat of Islamic Revolution as a pretext. Iraqi military intelligence reported in July 1980 that despite Iran's bellicose rhetoric, "it is clear that, at present, Iran has no power to launch wide offensive operations against Iraq, or to defend on a large scale." Days before the Iraqi invasion and in the midst of rapidly escalating cross-border skirmishes, Iraqi military intelligence again reiterated on 14 September that "the enemy deployment organization does not indicate hostile intentions and appears to be taking on

7728-540: The two nations to increase further. Iraq also helped to instigate riots among Iranian Arabs in Khuzestan province, supporting them in their labor disputes, and turning uprisings into armed battles between Iran's Revolutionary Guards and militants, killing over 100 on both sides. At times, Iraq also supported armed rebellion by the Kurdish Democratic Party of Iran in Kurdistan. The most notable of such events

7820-465: Was expected to be completed in 1992, resulting in a reservoir with a capacity of 17 cubic kilometres (4.1 cu mi) and a surface area of 100 square kilometres (39 sq mi). There is a potential for a pumped-storage scheme (several gigawatts) to be constructed on the left abutment; that still requires further optimisation and investigation. After the Gulf War, US$ 175 million worth of equipment were reported to have been stolen by Kurds in

7912-401: Was finally captured, the battle had delayed the Iraqis enough to allow the large-scale deployment of the Iranian military. In November, Saddam ordered his forces to advance towards Dezful and Ahvaz, and lay siege to both cities. However, the Iraqi offensive had been badly damaged by Iranian militias and air power. Iran's air force had destroyed Iraq's army supply depots and fuel supplies, and

8004-425: Was located near the border's southern end, to cut off the Shatt al-Arab from the rest of Iran and to establish a territorial security zone. The other two divisions invaded across the northern and central part of the border to prevent an Iranian counter-attack. On the northern front, the Iraqis attempted to establish a strong defensive position opposite Sulaymaniyah to protect the Iraqi Kirkuk oil complex . On

8096-405: Was only able to strike in depth with a few MiG-23BN , Tu-22 , and Su-20 aircraft, and Iran had built hardened aircraft shelters where most of its combat aircraft were stored. The next day, Iraq launched a ground invasion, mounting three simultaneous attacks along a 644 km (400 mi) front. Saddam hoped an attack on Iran would cause such a blow to Iran's prestige that it would lead to

8188-451: Was regarded in Baghdad as an irrational, existential threat to the Ba'ath government, especially because the Ba'ath party, having a secular nature, discriminated against and posed a threat to the fundamentalist Shia movement in Iraq, whose clerics were Iran's allies within Iraq and whom Khomeini saw as oppressed. Saddam's primary interest in war may have also stemmed from his desire to right

8280-408: Was strangling the country through an aerial siege. On the other hand, Iran's supplies had not been exhausted, despite sanctions, and the military often cannibalised spare parts from other equipment and began searching for parts on the black market. On 28 November, Iran launched Operation Morvarid (Pearl), a combined air and sea attack that destroyed 80% of Iraq's navy and all of its radar sites in

8372-599: Was the Iranian Embassy siege in London, in which six armed Khuzestani Arab insurgents took the Iranian Embassy's staff as hostages, resulting in an armed siege that was finally ended by Britain's Special Air Service . A 2014 academic source confirms that the embassy attackers were "recruited and trained" by the Iraqi government. According to former Iraqi general Ra'ad al-Hamdani , the Iraqis believed that in addition to

8464-430: Was to become part of the upstream shoulder of the main dam, and through two large diversion tunnels. The dam project involves a large underground power house and transformers chamber, largely completed into the left abutment. The power intake and spillway intake are also located on the left abutment, with associated tunnels through the limestone. Those tunnels emerge through one structure on the left abutment, downstream of

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