Brainerd, 1941: The first people began arriving at the depot at about eleven-thirty p.m. The mercury in the thermometer read twenty below zero, and it was still dropping. . . . A few minutes before midnight, the men the crowd had come to see marched into view--eighty-two of them, all dressed in khakis, responding on cue to barked commands. . . . The conductor called "all aboard." The band struck up "The Star-Spangled Banner." The men fell in and marched...