Executive Order 9066 was issued by President Franklin D. Roosevelt on February 19, 1942, during World War II. This order allowed the U.S. military to designate certain areas as exclusion zones, leading to the forced relocation of approximately 120,000 Japanese Americans from the West Coast. The order was justified by the government as a national security measure, but it resulted in significant loss of property and civil rights for those affected. Many of the relocated individuals were placed in internment camps, where they lived under harsh conditions until the order was eventually revoked in 1945.