During the intense fighting at Bastogne in 1944, Vincent Speranza went to visit a fellow 101st Airborne Division paratrooper in a makeshift hospital. Speranza asked the man what he could do to help, and the man asked for a drink. Speranza set out to find something for his friend and came across a bombed-out tavern that, improbably enough, still had a functioning beer tap. He filled up his helmet with some Belgian ale and returned to the field hospital. Not surprisingly, other wounded GIs asked Speranza to bring another round, and he continued tending bar for the wounded soldiers, running...