Iran–Iraq War

Reader's Guide

It involved large-scale trench warfare, deliberate attacks on civilians, and Iraqi chemical attacks. The conflict did not alter permanent borders, and neither side received war reparations. The war deepened Iran's isolation and strained its economy, while Iraq accrued massive debt. It also set the stage for future regional tensions, including Iraq's later invasion of Kuwait.

Did You Know?

• The war is called the First Imposed War by Iran.
• Iraq used chemical weapons against civilians during the conflict.
• Neither country received war reparations after the ceasefire.

Roots of the Conflict: Territory, Ideology, and Fear

The hostility between Tehran and Baghdad did not emerge from a single flashpoint but from decades of accumulated grievance. That territorial concession became a persistent sore in Baghdad's memory. Khomeini's public exhortations for Iraqis to topple the Ba'athist regime, combined with his framing of Iraq's Shia majority as oppressed under Sunni rule, struck the secular Ba'ath leadership as an existential threat. Saddam Hussein, having spent years arming Iraq with Soviet and French hardware, saw in Iran's post-revolutionary disarray a window to reclaim the riverbank, halt the export of revolutionary ideology, and assert himself as the dominant power in the Persian Gulf.

Eight Years of Attrition: From Blitzkrieg to Stalemate

Rather than stopping at the restored border, Tehran launched a full-scale invasion of Iraqi soil, committing to a grinding five-year offensive that never achieved a breakthrough. The conflict devolved into vast trench systems stretching across the desert, punctuated by deliberate Iraqi chemical-weapons strikes against Iranian soldiers and civilians. The cumulative toll was staggering: roughly half a million killed, not counting victims of the separate Anfal campaign, making it the bloodiest conventional war ever fought between the regular armies of developing nations.

A Web of Foreign Patronage

The conflict quickly transcended the two belligerents, drawing in a sprawling and often contradictory constellation of external actors. On the Iraqi side, support ranged from the National Council of Resistance of Iran, an opposition group of Iranian exiles, to major powers including the United States, the United Kingdom, the Soviet Union, France, Italy, and Yugoslavia, alongside the broad backing of most Arab states. Iran, for its part, received assistance from the Kurdistan Democratic Party and the Patriotic Union of Kurdistan operating in the northern mountains, as well as from Syria, Libya, North Korea, China, South Yemen, Pakistan, Cuba, and even Israel. The irony of these alignments was stark: Cold War rivals such as Washington and Moscow simultaneously supplied Baghdad, while Tehran found partners in both the Soviet-aligned and the Western-aligned camps. Iraq also bankrolled Arab separatist movements inside Iran, seeking to fracture the country from within. This patchwork of patronage meant that neither side could claim exclusive international legitimacy, and the war became a proxy theater in which superpower interests, Arab regional rivalry, and Kurdish aspirations all intersected.

The Ceasefire and Its Long Shadow

The settlement left the pre-war borders intact; neither nation extracted reparations from the other, and both emerged financially scarred. The formal end of hostilities did not, however, end the hostility.