In October 1942, he took command of XI Corps. He led the corps in combat in the Pacific War, fighting on New Guinea and at Morotai. The corps then fought at Leyte and on Luzon in the Philippine Campaign, most notably in the Battle of Bataan. Hall was designated to lead XI Corps ashore at Shibushi Bay in Operation Downfall, but this was prevented by the Surrender of Japan. In September 1945, the corps landed at Yokohama for the initial occupation of Japan. Hall relinquished command of the corps on March 15, 1946.