PHILADELPHIA (Reuters) - The U.S. Army's status as a professional volunteer force devoid of draftees has produced combat troops more likely to follow the moral direction of their superiors than American soldiers of the past, an Army report said on Friday. In an analysis of what motivated U.S. troops during combat in Iraq, scholars at the U.S. Army War College found that the ground forces of Operation Iraqi Freedom had more idealized notions of their military role than the soldiers of World War II, Korea or Vietnam. Comments by 40 soldiers from two Army divisions and a Marine division, which...