And the top general in charge of training the US Army is warning the wars in Iraq and Afghanistan are hampering efforts to train US troops. In a memo last month, Gen. Martin Dempsey, the commander of the US Army Training and Doctrine Command, said the Army’s training ability is “increasingly at risk.” Dempsey says the wars have forced the military to rely on outside contractors to train troops, with just 30 percent of instructors now coming from the Army’s own ranks.