The Gulf War was an armed conflict between Iraq and a 42-country coalition led by the United States. The coalition's efforts were in two phases: Operation Desert Shield, which marked the military buildup from August 1990 to January 1991; and Operation Desert Storm, from the bombing campaign against Iraq on 17 January until the American-led liberation of Kuwait on 28 February.
On 2 August 1990, Iraq, governed by Saddam Hussein, invaded neighboring Kuwait and occupied the country within two days. The invasion was primarily over Kuwait's alleged slant drilling in Iraq's Rumaila oil field, and Iraq's large debt to Kuwait from the recently ended Iran–Iraq War.