LOEGj.AuSt.91The nation’s top military commander painted a dark picture Tuesday of future U.S. defense capabilities clouded by shrinking Pentagon budgets and adversaries’ technological advances that he said would erode American battlefield superiority. Army Gen. Martin Dempsey, chairman of the Joint Chiefs of Staff, provided his sobering views as part of the Quadrennial Defense Review, a congressionally mandated evaluation of U.S. military strength issued every four years. Dempsey predicted that it would become increasingly difficult to balance the competing demands of protecting allies abroad, securing Americans at home and deterring future wars. MORE