Question

how the Japanese relocation was a physical security measure？

Answer 1

Japanese relocation was a physical security measure because the Americans feared that during the World War II, many Japanese Americans would act as spies of the Japanese government and would pass on critical and confidential information about the policies and practices of the American government during the World War II to the Japanese government. In order to prevent this from happening, American government allowed for Japanese relocation in the concentration camps and their internment as a physical security measure to prevent information leakage and possibility of attack on the country.