The forced evacuation from their West Coast homes and incarceration in American concentration camps of 120,000 Japanese Americans and immigrants from Japan during World War II is a story that has not been well known. This happened at a time when the Constitution did not protect innocent persons who had done no wrong but were imprisoned for no reason other than their ethnic heritage. The majority were American citizens. The evacuation and incarceration were found to have been caused by racial prejudice, war hysteria, and a lack of competent political leadership.