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55-510: 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 Operation Prime Chance (August 1987 – June 1989) was a United States Special Operations Command operation intended to protect U.S.-flagged oil tankers from Iranian attack during

110-592: 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

165-581: 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:

220-444: 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,

275-641: 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

330-685: 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,

385-433: A tanker on the very first Earnest Will convoy struck a mine, which made it clear that more forces would be necessary to assure the safety of the civilian vessels. The Joint Chiefs of Staff launched a search for helicopter pilots who could fly at night from navy ships, then set out to train them for the special requirements of the job. Helicopters from the army's 160th Special Operations Aviation Regiment (Airborne) reached

440-531: 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

495-519: 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

550-457: 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

605-590: 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

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660-536: The Iran–Iraq War . The operation took place roughly at the same time as Operation Earnest Will (July 1987 – September 1988), the largely naval effort to escort the tankers through the Persian Gulf . The operation was begun after the mining of the U.S.-flagged Kuwaiti oil tanker Bridgeton . The two operations were intertwined— United States Army helicopters flew nighttime search-and-destroy missions from Navy frigates and destroyers and from two leased barges in

715-499: 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

770-508: 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

825-615: 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

880-496: The La Salle detachment transferred to the frigate Jarrett and escorted the convoy to the Gulf of Oman . Soon afterward, operations began from the barges, dubbed Mobile Sea Bases (MSBs). They were set up as naval special warfare task units (NSWTU) run by a SEAL commander and answering to the regional naval special warfare task group. Their mission was to stop Iranian forces from mining

935-520: 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

990-486: 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

1045-533: The United States Navy guided-missile frigate USS  Jarrett  (FFG-33) to shadow her. When the aviators reported that people aboard Iran Ajr were laying mines , the U.S. commander in the Persian Gulf ordered the pilots to "stop the mining." The helicopters fired on the ship, killing some of the crewmen and chasing others into the water. A team of United States Navy SEAL commandos later boarded

1100-686: 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

1155-438: 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

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1210-709: 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

1265-853: The Iran-Iraq ceasefire began in July 1988. Wimbrown 7 soon returned to port, but Prime Chance patrols continued from Hercules until June 1989. Ships involved in Prime Chance include: Units involved in Prime Chance include: 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

1320-485: 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

1375-504: 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

1430-560: 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

1485-599: 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

1540-930: 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

1595-451: 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

1650-520: 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

1705-504: The Persian Gulf or otherwise attacking shipping. Each mobile sea base had two detachments of Mark III patrol boats , a SEAL platoon , an EOD detachment, Marines to provide security, army MH-6 and AH-6 Little Bird helicopter gunships and Black Hawk rescue birds, and air force combat controllers . Mobile Sea Base Hercules was crewed by East Coast naval special warfare units, including Patrol Boats 777 and 758 from Special Boat Unit 20 and Special Boat Unit 24. Mobile Sea Base Wimbrown 7

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1760-481: 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

1815-496: 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

1870-559: 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

1925-463: The end of 1980, Iraq had destroyed about 500 Western -built Iranian tanks and captured 100 others. Iran Ajr On 21 September 1987, U.S. forces involved in Operation Prime Chance – the covert part of Operation Earnest Will , the mission to protect U.S.-flagged petroleum -carrying ships in the Persian Gulf – tracked Iran Ajr and dispatched United States Army helicopters from

1980-593: 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

2035-399: The first to use night vision goggles and forward looking infrared devices in combat. Tactics included using MH-6 Little Birds as spotters for the more heavily armed AH-6s for barge-launched missions, and using the warship's radar and that of their SH-60 Seahawk helicopters for the same purpose on ship-launched efforts. Planning and preparation for Prime Chance was launched soon after

2090-456: 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

2145-462: 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

2200-425: 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 ,

2255-449: The navy's command ship La Salle in the Persian Gulf on 5 August 1987. The detachment was divided into two teams, with call sign SEABAT and one MH-6 Little Bird, two AH-6s, aircrew, and maintainers. On 8 August, one detachment participated in a convoy escort mission aboard La Salle . The other flew onto the frigate Klakring to protect minesweepers operating in the narrow shipping channel west of Farsi Island . The following day,

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2310-410: The northern Persian Gulf . Navy SEALs and explosive ordnance disposal operated from the barges as well. But while Earnest Will was the widely publicized reaction to Kuwaiti pleas for help, Prime Chance was secret. The army helicopters flew at night, slipping to and from navy flight decks under cover of darkness. The helicopter pilots often flew some 30 feet (9.1 m) above the water, and became

2365-426: 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

2420-497: 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

2475-467: The ship, confirmed the presence of mines, and detained the 26 surviving Iranians. Rear Admiral Harold Bernsen said later that the detainees "were given the opportunity to seek political asylum . I think that was stated in Washington." Bernsen was "not actually present" when the offers were made by "an officer on my staff," whom he refused to identify. There were no State Department personnel present at

2530-408: 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

2585-447: 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

2640-569: The time, he said, but it was within his authority to make the offer in conformity with the policies of the US Department of State . "I think it was done very simply, and very generously." On 26 September, EOD MU5 Detachment 5 scuttled the ship in international waters . When the U.S. Navy guided-missile frigate USS  Samuel B. Roberts  (FFG-58) struck a mine in the Persian Gulf in April 1988, U.S. Navy explosive ordnance specialists matched

2695-540: 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

2750-486: The vessel and quickly seized it. During the attack, five Iranians were killed and 26 were captured. Several Iranian sailors were rescued from the waters of the Persian Gulf after jumping overboard during the attack. After collecting intelligence data the SEALs and EOD scuttled the vessel the following day. In January 1988, Task Force 118 arrived with OH-58D Kiowa Warrior helicopters. Earnest Will ended about five months after

2805-412: Was crewed by West Coast units, including Patrol Boats 753 and 757 from Special Boat Unit 13 and Patrol Boats 775 and 776 from Special Boat Unit 12. On 21 September 1987, Iran Ajr , an Iranian ship converted for use as a minelayer , was attacked. Using night-vision devices, Army gunship crews watched the Iranian vessel lay several mines, then swooped in firing miniguns and rockets. A SEAL team boarded

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2860-401: 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

2915-480: 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

2970-408: 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

3025-599: 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

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