After the attacked on pearl harbour by Japanese, created fear and outrage against the Japanese Americans, and it was a common belief that the Japanese Americans were spies and had helped them. President Roosevelt issued Executive order 9066 in 1942 to evacuate all persons who could be a threat to national security from the west coast. Japanese were sent to live in camps with barbed wires and were not allowed to go outside the premises. Most of these camps built in the areas where the Japanese were populated. It was justified because Roosevelt issued an order on the grounds of military necessity, and to reduce a threat to national security.
