CAMP PENDLETON, Calif. (AP) -- A Marine accused of killing unarmed Iraqi women and children pleaded guilty Monday to dereliction of duty in a deal that will mean a maximum of three months confinement and end the largest and longest-running criminal case against U.S. troops to emerge from the Iraq War.Staff Sgt. Frank Wuterich of Meriden, Conn., led the Marine squad in 2005 that killed 24 Iraqis in the town of Haditha after a roadside bomb exploded near a Marine convoy, killing one Marine and wounding two others.It was a stunning and muted end to a case once described as the Iraq War's version of the My Lai massacre in Vietnam.The incident in Iraq is considered among the war's defining moments, further tainting America's reputation when it was already at a low point after the release of photos of prisoner abuse by U.S. soldiers at Abu Ghraib prison.Eight Marines were charged with killing the Iraqis, with Wuterich facing the possibility of life behind bars. In the end, seven Marines were acquitted or had charges dropped, and Wuterich pleaded to the single, minor charge.The killings still fuel anger in Iraq after becoming the primary reason behind demands that U.S. troops not be given immunity from their court system.Wuterich's plea interrupted his trial at Camp Pendleton before a jury of combat Marines who served in Iraq.In a hearing to determine if the facts of the plea were accurate and that he agreed, Wuterich acknowledged he was negligent in his duties because he told his squad to shoot first and ask questions later, or words to that effect.\Honestly