During the Iran–Iraq War, Khuzestan was the focus of the Iraqi invasion of Iran, leading to the flight of thousands of the province's residents. As a result, Khuzestan suffered the heaviest damage of all Iranian provinces during the war. Iraq's President Saddam Hussein felt confident that the Arab population of the Khuzestan would react enthusiastically to the prospect of union with Iraq. However, resistance to the invasion was fierce, stalling the Iraqi military's advance, and ultimately opening a window of opportunity for an Iranian counter-offensive.