When Japanese forces attacked Pearl Harbor on December 7, 1941, Americans reacted with revulsion and horror. In the patriotic war fever that followed, thousands of volunteers--including Japanese Americans--rushed to military recruitment centers. Except for those in the Hawaii National Guard, who made up the 100th Infantry Battalion, the U.S. Army initially turned Japanese American prospects away. Then, as a result of anti-Japanese fearmongering on the West Coast, more than 100,000 Americans of Japanese descent were sent to confinement in inland "relocation centers." Most were natural-born...