The First Intifada, a Palestinian uprising against Israeli rule, broke out in 1987, with waves of uncoordinated demonstrations and violence occurring in the occupied West Bank and Gaza. Over the following six years, the Intifada became more organised and included economic and cultural measures aimed at disrupting the Israeli occupation. More than a thousand people were killed in the violence. During the 1991 Gulf War, the PLO supported Saddam Hussein and Iraqi Scud missile attacks against Israel. Despite public outrage, Israel heeded US calls to refrain from hitting back and did not participate in that war.