Iran–Iraq War

Operation Kaman 99 was the Iranian Air Force's retaliatory response to Iraqi surprise aerial attacks on September 22, 1980, which had opened the Iran–Iraq War. Launched the following day and involving nearly 200 aircraft, it stands as the largest operation ever conducted by the Islamic Republic of Iran Air Force. The operation's outcome was sufficiently successful that Iran achieved air superiority during the early years of the conflict, a significant advantage in the opening phase of what would become an eight-year war. By seizing early control of the air, Iran was able to limit Iraqi aerial freedom of action at a critical moment when the war's initial dispositions were still being established.

Operation Morvarid was a coordinated Iranian naval and air force strike launched in November 1980 against Iraqi Navy positions in the early months of the Iran–Iraq War. The operation was a direct response to Iraq's deployment of radar and monitoring equipment on the Mina Al-Bakr and Khor-al-Amaya oil rigs, infrastructure Iraq had repurposed to track and counter Iranian air operations. The operation resulted in an Iranian victory: both oil rigs were destroyed, much of the Iraqi Navy was eliminated, and significant damage was inflicted on Iraqi ports and airfields. By neutralizing the Iraqi naval surveillance network at these installations and degrading Iraqi naval strength, Iran removed a key layer of Iraqi situational awareness over its air approaches and asserted dominance in the maritime dimension of the early conflict. Iraqi naval casualties reached 321, reflecting the scale of the damage inflicted on Iraq's naval forces during the operation.

Operation Scorch Sword was the opening Iranian counterstrike against Iraqi strategic infrastructure, launched just eight days after Iraq's invasion of Iran in September 1980. By targeting the Osirak nuclear reactor at Tuwaitha — then under construction and widely regarded as a central asset of Iraq's nuclear program — Iran signaled a willingness to strike deep into Iraqi territory and attack capabilities well beyond the immediate front lines. The operation demonstrated that Iran retained the capacity to project airpower against high-value targets near Baghdad in the earliest phase of the war, complicating Iraqi assumptions about the conflict's scope.

The siege of Abadan marked a significant escalation in the early phase of the Iran–Iraq War. Iraqi forces encircled the city beginning in November 1980, having subjected it to near-daily bombardment since the war opened in September. The encirclement demonstrated Iraq's operational ambition to sever and hold major Iranian urban centers, while the disparity between Iraqi and Iranian force sizes present at Abadan reflected Iran's effort to contest the city despite broader disorganization in the early war period. Iraqi casualties of roughly 1,500 against Iranian losses of approximately 3,000 indicate sustained and costly fighting within what was already a heavily damaged urban environment.

The Iranian strike on H-3 Air Base in western Iraq destroyed at least 48 Iraqi aircraft on the ground in a single surprise attack, inflicting a severe material blow on the Iraqi Air Force. Conducted with no Iranian losses, the raid demonstrated that Iran retained meaningful offensive air capability despite the pressures of the ongoing war. The lopsided exchange represented a significant setback to Iraqi air power at a stage of the Iran–Iraq War when both sides were contesting aerial superiority over the battlefield and rear areas.

Operation Nasr (also known as Operation Hoveyzeh), fought in early January 1981, stands as the largest tank battle of the Iran–Iraq War. The engagement involved Iraqi forces numbered between 65,000 and 80,000 troops, underscoring the scale of Iraq's commitment to operations in the Dezful area. Iranian forces under Abolhassan Banisadr and Meguertitch Khan Davidkhanian contested the battle with recorded casualties on both sides, though the outcome was not decisively recorded. As the war's largest armored engagement to that point, the battle reflected the high-intensity conventional warfare that characterized the early phase of the conflict before both sides adapted to attritional tactics.

Operation Tariq al-Qods was an Iranian offensive launched to recapture Bostan in Khuzestan province from Iraqi forces during the Iran–Iraq War. Fought over roughly ten days in late November and early December 1981, the operation was conducted jointly by the Iranian Army and the Islamic Revolutionary Guard Corps, reflecting the increasingly coordinated role of the IRGC alongside conventional military units in Iranian offensive planning. Khuzestan was a central theater of the war, and the recovery of populated areas in the province carried both strategic and symbolic weight for Iran as it sought to reverse the Iraqi territorial gains made following the 1980 invasion. Casualties on both sides were significant relative to the force sizes committed, indicating the intensity of the fighting, though the ultimate operational outcome is not recorded in available sources.

The recapture of Khorramshahr on 24 May 1982 stands as a turning point in the Iran–Iraq War. The city had fallen to Iraqi forces on 26 October 1980 during the opening phase of the Iraqi invasion, making its recapture a significant reversal of Iraqi territorial gains. Conducted as part of Iran's Operation Beit ol-Moqaddas, the battle saw Iranian forces numbering approximately 100,000 engage an Iraqi garrison of around 80,000, inflicting roughly 8,000 Iraqi casualties at a cost of 12,000–15,000 Iranian dead and wounded. The successful operation demonstrated Iran's capacity to mount large-scale offensive action and retake major urban centers, shifting momentum away from Iraq. The liberation of Khorramshahr is commemorated annually in Iran, reflecting its enduring political and symbolic weight within the Islamic Republic's narrative of the war.

Operation Beit ol-Moqaddas achieved its primary objective of liberating Khorramshahr and pushed Iraqi troops back to the international border. Combined with Operation Tariq-ol-Qods and Operation Fath-ol-Mobin, it completed the eviction of Iraqi forces from southern Iran. The three operations together shifted the momentum of the Iran–Iraq War decisively toward Iran, ending the phase in which Iraq held Iranian territory and setting the conditions for Iran to consider carrying the war across the border. Iranian forces numbered roughly 200,000 against an Iraqi force of approximately 65,000; Iraqi casualties were around 8,000 while Iranian losses reached 12,000–15,000.

Operation Ramadan was an Iranian offensive launched near Basra in July 1982 during the Iran–Iraq War, consisting of three separate attacks sustained over six weeks. Described as the largest land battle since World War II by scale of forces engaged, it drew between 90,000 and 150,000 Iranian troops against an Iraqi force of 80,000 to 100,000. Combined casualties exceeded 17,000, with Iran sustaining roughly 12,000 and Iraq approximately 5,000. Despite the scale of the operation, the engagement did not produce a decisive shift; it formed part of the broader stalemate that characterized the war's middle phase. The offensive demonstrated Iran's willingness to absorb heavy losses in pursuit of territorial objectives near Basra, while Iraq's ability to absorb the assault without collapse indicated the durability of its defensive posture along that axis.

Operation Undeniable Victory (Fath-ol-Mobin) was a major Iranian military operation during the Iran–Iraq War, conducted in March 1982 and resulting in the Battle of Shush. Led by Lt. General Ali Sayad Shirazi, the operation was carried out in four phases and engaged Iraqi forces numbering between 80,000 and 160,000 troops against an Iranian force of 80,000 to 100,000. Iraqi casualties reached approximately 8,000 against roughly 4,000 Iranian losses, suggesting Iran retained an operational advantage in the engagement. The operation represented a significant Iranian effort to reverse Iraqi gains from the 1980 invasion and formed part of the broader Iranian counteroffensive push in early 1982.

Operation Dawn-4 was an Iranian offensive launched in October 1983 during the Iran–Iraq War that resulted in Iran capturing a small amount of Iraqi territory. The operation produced notable casualties on both sides, with Iraq suffering approximately 2,800 and Iran approximately 5,000, suggesting the territorial gain came at a disproportionate cost to the attacker. Within the broader pattern of the war, the operation reflected Iran's persistent strategic posture of offensive ground pressure aimed at steadily eroding Iraqi-held positions, though the limited territorial results indicate the operation achieved only marginal strategic effect.

Operation Dawn 6 was a two-day Iranian offensive in February 1984, part of a coordinated effort alongside Operation Dawn 5 to sever the Baghdad–Basra highway and isolate Iraq's two largest cities from each other, threatening the supply network sustaining Iraqi frontline forces. The operation was designed to exploit gains made by Operation Before the Dawn, which had captured high ground roughly 15 miles from the highway, by pushing through toward that objective. Iraqi defenses held against every Iranian assault, and Iran withdrew after only two days. The failure to reach the highway foreclosed the broader strategic aim of strangling Iraqi military logistics along that corridor. It also redirected Iranian operational planning: the setback led directly to Operation Kheibar, which reoriented the offensive axis toward Basra rather than the highway itself, marking a significant shift in Iran's approach during this phase of the war.

The Tanker War constituted a sustained campaign of attacks on merchant shipping in the Persian Gulf and Strait of Hormuz running across much of the Iran–Iraq War. Iraq carried out 283 attacks and Iran 168, targeting vessels that sustained the oil trade and supply lines of both belligerents and neutral states. By threatening one of the world's most critical commercial waterways, the campaign drew outside powers into the conflict and placed pressure on Gulf states dependent on oil export revenues. The cumulative disruption to neutral shipping elevated the Tanker War from a bilateral military contest into an international economic and diplomatic crisis that outlasted any single engagement.

The First Battle of al-Faw was fought on the al-Faw peninsula between February and March 1986, resulting in Iranian forces capturing the al-Faw peninsula and cutting off Iraqi access to the Persian Gulf. The operation is considered one of Iran's greatest achievements in the Iran–Iraq War. The loss of the peninsula hardened Iraqi attitudes toward prosecuting the war, deepening the conflict rather than prompting any resolution. Iran held the peninsula until Iraqi forces recaptured it near the end of the war, making al-Faw a contested strategic prize across the final years of the conflict. The battle's outcome demonstrated that Iran, despite facing significant resource constraints, could execute operations capable of seizing and holding strategically significant coastal terrain against Iraqi defenses.

Operation Earnest Will marked a direct U.S. military commitment to the security of Kuwaiti oil shipments during the Tanker War phase of the Iran–Iraq War. Launched in 1987, it constituted the largest American naval convoy operation since World War II. The operation followed closely from UN Security Council Resolution 598, adopted three days earlier, which called for an end to hostilities between Iran and Iraq. By escorting Kuwaiti-flagged tankers against Iranian attacks, the United States inserted itself as an active party in the maritime conflict, signaling that Gulf oil transit would be defended by American naval power. This posture applied direct pressure on Iran at a moment when international diplomacy was working to bring the war to a close.

Operation Prime Chance was a U.S. Special Operations Command mission launched to protect American-flagged oil tankers from Iranian attack during the Iran–Iraq War. It ran concurrently with Operation Earnest Will, the broader naval escort effort moving Kuwaiti tankers through the Persian Gulf under U.S. flags. The operation was initiated in direct response to the mining of the Bridgeton, one of the reflagged Kuwaiti tankers, which demonstrated the vulnerability of commercial shipping to Iranian interdiction. Together, these operations reflected U.S. intervention in the Gulf to keep oil shipping lanes open and counter Iranian pressure during the war's later stages.

Operation Karbala-5, the Iranian offensive aimed at capturing the Iraqi port city of Basra in early 1987, was the largest battle of the Iran–Iraq War. Iran committed between 150,000 and 200,000 troops against an Iraqi force of approximately 300,000 defenders. The assault produced extreme casualties — roughly 10,000 Iraqi and 40,000 Iranian — without Iran achieving its objective of taking Basra. The failure proved decisive for the wider war: Karbala-5 was the last major Iranian offensive of the conflict. Having expended massive manpower in a failed effort to seize Iraq's principal southern city, Iran was unable to mount a comparable strategic operation thereafter. The battle effectively marked the point at which Iranian offensive momentum in the war was exhausted.

Operation Mersad was Iran's counteroffensive against the Mojahedin-e-Khalq (MEK) incursion into western Iran in July 1988, known on the MEK side as Operation Forough Javidan. The engagement stands as one of the last major military actions of the Iran–Iraq War. The MEK force of approximately 7,000 suffered around 1,500 casualties against an Iranian response that drew on a force more than twenty times its size. The operation effectively ended the MEK's conventional military challenge to the Islamic Republic, foreclosing any prospect that the organization could leverage the war's closing phase to alter the political order inside Iran.

Operation Praying Mantis was a direct U.S. military response to the mining of an American warship in the Persian Gulf four days earlier. Conducted on April 18, 1988, during the presidency of Ronald Reagan and the rule of Iranian Supreme Leader Ruhollah Khomeini, the operation targeted Iranian naval assets and resulted in approximately 300 Iranian casualties. The action represented one of the most significant direct military engagements between the United States and Iran during the broader Iran–Iraq War period, demonstrating U.S. willingness to use force in defense of freedom of navigation in the Gulf. Its execution under two principal commanders — Rear Adm. Anthony A. Less on the American side and Mohammad-Hossein Malekzadegan on the Iranian side — underscored the operational scale of the confrontation.