After the attack on Pearl Harbor in 1941, over 120,000 Japanese Americans living on the west coast, two thirds of whom were U.S. citizens, were forcibly relocated to internment camps in the interior of the country. General John L. DeWitt advocated for their internment due to concerns about potential disloyalty, influenced by his own biases. In February 1942, President Roosevelt signed Executive Order 9066 authorizing the removal and exclusion of people from certain areas, and Japanese Americans were forced to report to camps surrounded by barbed wire in remote desert locations. While the Supreme Court upheld the internment in 1944, Fred Korematsu's conviction was later overturned when it was found the Justice Department withheld evidence