On April 14, 2004, Marine Cpl. Jason Dunham, a squad leader with 3rd Battalion, 7th Marines, was leading his men on a mission near Karabilah, Iraq. A call came through that the battalion commander’s convoy was under attack by small-arms fire and rocket-propelled grenades. Hopping into Humvees, the Marines made their way toward Camp Husaybah, two kilometers away.