What was the policy regarding japanese americans in the military during world war ii?

Japanese internment camps were established during World War II by President Franklin Roosevelt through his Executive Order 9066. From 1942 to 1945, it was the policy of the U.S. government that people of Japanese descent would be interred in isolated camps. Enacted in reaction to Pearl Harbor and the ensuing war, the Japanese internment camps are now considered one of the most atrocious violations of American civil rights in the 20th century.

a system of cooperative federalism emerged, as the powers of the federal government expanded.