Iran–Iraq War

1980–1988 Middle East Status: ended Casualties: ~1 million

Attritional trench warfare reminiscent of WWI, with chemical weapons and mass infantry assaults. Ended in stalemate with UN Resolution 598. Both sides exhausted; the border unchanged.

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Belligerents

Iraq (Saddam Hussein)
Iran (Islamic Republic)

Casualties

~1 million

Key events

1980 — Iraq invades
1982 — Iran retakes Khorramshahr
1988 — UN ceasefire (Resolution 598)

Aftermath

Iraq's $80B war debt drove its 1990 Kuwait invasion → Gulf War → 2003 invasion → ISIS — a 40-year cascade. Hardened Iranian regime; created the IRGC's regional reach. Western tolerance of chemical weapons use undermined non-proliferation norms for decades.

Weapons & matériel

Soviet T-72 / T-62 tanks (Iraq)
Chieftain / M60 (Iran)
Scud missiles (war of the cities)
Mustard gas / nerve agents (Iraqi use, ~100,000 Iranian casualties)
Human-wave assaults (Iran's Basij)

Technology

Most extensive chemical-weapon use since WWI; first widespread tactical ballistic-missile exchange

Cost

~$1.1 trillion combined (1988 dollars). Iraq's oil debt fueled the 1990 Kuwait invasion

Sources

Pierre Razoux, The Iran-Iraq War
Anthony Cordesman

From World at War, an interactive atlas by Jairus Pereira. Figures are approximate, drawn from Wikipedia, UCDP, ACLED and academic sources — a design artefact, not an authoritative register. Contact.