In March 1942, the U.S. War Relocation Authority was established. The American government, fearful of subversive activities at home, created 10 detention facilities to house persons of Japanese descent. The camps were located in Arizona, Arkansas, California, Idaho, Utah, and Wyoming. In total, the federal government forcibly moved 110,000 Japanese-Americans to the detention camps. The largest camp was the Manzanar Relocation Camp, in California. At its peak, Manzanar housed over 11,000 people.
Richert, Lucas Paul. "Japanese Internment; War Relocation Authority". The Literary Encyclopedia. First published 01 November 2008
[http://www.litencyc.com/php/stopics.php?rec=true&UID=5620, accessed 18 June 2013.]