The Iran-Iraq War (1980-1988)
The devastating eight-year conflict that shaped modern Iran and Iraq, killing over a million people.
Origins of the War
On September 22, 1980, Saddam Hussein's Iraq invaded Iran, launching one of the longest conventional wars of the 20th century. Saddam calculated that revolutionary chaos had weakened Iran's military, and he sought to seize the oil-rich Khuzestan province and assert Iraq as the dominant Gulf power. He also feared that Khomeini's revolution would inspire Iraq's Shia majority to revolt.
The territorial dispute centered on the Shatt al-Arab waterway, a critical oil export route. But the deeper driver was a power vacuum: with Iran in revolutionary turmoil and the US humiliated by the hostage crisis, Saddam saw an opportunity to remake the regional order.