Third and fourth terms of the presidency of Franklin D. Roosevelt
On the morning of December 7, 1941, the Japanese struck the U.S. naval base at Pearl Harbor with a surprise attack, knocking out the main American battleship fleet and killing 2,403 American servicemen and civilians. The great majority of scholars have rejected the conspiracy thesis that Roosevelt, or any other high government officials, knew in advance about the Japanese attack on Pearl Harbor. The Japanese had kept their secrets closely guarded, and while senior American officials were aware that war was imminent, they did not expect an attack on Pearl Harbor. Roosevelt had anticipated that the first attack would take place in the Dutch East Indies, Thailand, or the Philippines.
Presidency of Franklin D. Roosevelt
The attack on Pearl Harbor raised concerns in the public regarding the possibility of sabotage by Japanese Americans. This suspicion was fed by long-standing racism against Japanese immigrants, as well as the findings of the Roberts Commission, which concluded that the attack on Pearl Harbor had been assisted by Japanese spies. The size of the Japanese population in Hawaii precluded mass internment in that territory, but there was strong popular support for the removal of Japanese from the West Coast. In February 1942, President Roosevelt signed Executive Order 9066, which provided for the relocation of hundreds of thousands of Japanese-American citizens and immigrants from the West Coast. They were forced to liquidate their properties and businesses and interned in hastily built camps in interior, harsh locations. Distracted by other issues, Roosevelt had delegated the decision for internment to Secretary of War Stimson, who in turn relied on the judgment of Assistant Secretary of War John J. McCloy. The Supreme Court upheld the constitutionality of the executive order in the 1944 case of "Korematsu v. United States". The internment order was rescinded shortly after the "Korematsu" decision, and Japanese-Americans were allowed to return to the West Coast. Many German and Italian citizens were also arrested or placed into internment camps.