Which areas were designated as military areas under Executive Order 9066?

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Under Executive Order 9066, two military areas were designated. Military Area No. 1 encompassed the western halves of California, Oregon, and Washington, along with southern Arizona. Military Area No. 2 included the remaining areas of these four states.1

Executive Order 9066, issued by President Franklin D. Roosevelt, granted the secretary of war the authority to prescribe military areas from which individuals could be excluded. While the order did not explicitly name any group or location, it was applied to virtually the entire Japanese American population on the West Coast following the attack on Pearl Harbor. This led to the establishment of internment camps in California, Arizona, Wyoming, Colorado, Utah, and Arkansas, where over 110,000 Japanese Americans were detained during the war.12