The second major operation in the Iraqi city of Fallujah of the year sees US and Iraqi forces engaged in some of the most intensive urban warfare seen since the Vietnam War as part of a major effort to drive out insurgents. After placing a cordon around the entire city and urging civilians to leave, US Marines, Special Forces and Commandos moved in to clear the city of guerrilla fighters street by street. With rumours of banned weapons - including white phosphorus - being used by US forces, and civilian casualties estimated as up to 6,000, the Second Battle of Fallujah remains one of the most controversial of the ongoing Iraq War. As many as 1,350 insurgents were killed, a further 1,500 captured, with US losses of 95 dead, 560 wounded, and a further 11 Iraqi Army soldiers also killed.