First Battle of Fallujah, U.S. military campaign during the Iraq War that began April 4 and ended May 1, 2004. Its goal was to pacify the city of Fallujah in Iraq, rid it of extremists and insurgents, and find those responsible for the March 31 ambush and killing of four American military contractors. The public display of the beaten and burned bodies of the four killed men, hanged from a bridge over the Euphrates River, provoked worldwide outrage as well as the American response to retake control of the city beginning on April 4.
A third of Fallujah had been retaken within a week, but due to the considerable destruction of the city, including that of numerous mosques used as insurgent bases, and heavy civilian deaths by U.S. airstrikes, the interim Iraqi government pressured the American forces to withdraw from the city on May 1. The U.S. then turned over military operations to the 1,100-man Fallujah Brigade, but by September, the brigade had dissolved and turned over all of their American weapons and equipment to the insurgents.
U.S. forces suffered 27 deaths during the First Battle of Fallujah; some 200 insurgents were killed, as were an approximate 600 Iraqi civilians, 300 of them believed to be women and children.
In November 2004, the U.S.-led coalition mounted a follow-up campaign (the Second Battle of Fallujah) to retake the city, a center of Sunni Muslim resistance and a longtime stronghold of Saddam Hussein’s Baʿath Party, to prevent the further spread of the armed opposition to the U.S. occupation of Iraq. In this campaign the insurgents were largely destroyed, and the resistance never again challenged the coalition in open combat.