The Iran-Iraq War (1980-1988) was initiated by Saddam Hussein's invasion of Iran, driven by political, religious, and territorial motives, as Iraq sought to assert dominance in the region. Despite initial Iraqi successes, Iranian forces regrouped and reclaimed territory through heavy casualties and trench warfare, ultimately leading to a ceasefire in 1988 without a formal peace treaty. The war left both nations economically and socially devastated, with Saddam remaining in power but facing significant domestic unrest and Iran consolidating its influence, despite Khomeini's dissatisfaction with the ceasefire.