The Pentagon’s chief said Thursday he could send more U.S. troops to Afghanistan this year than he’d initially expected and is considering increasing the number of soldiers in the Army. Both issues reflect demands on increasingly stressed American forces tasked with fighting two wars.

Defense Secretary Robert Gates’ comments came during a short visit to Fort Drum in upstate New York — an Army post that that he said has deployed more soldiers to battle zones over the last 20 years than any other unit. Two Fort Drum brigades are headed to Iraq later this year, and a third is currently in Afghanistan.