Answer:
At the time of the Japanese attack on Pearl Harbor in 1941, about 120,000 persons of Japanese ancestry lived on the US mainland, mostly along the Pacific Coast. About two thirds were full citizens, born and raised in the United States. Following the Pearl Harbor attack, however, a wave of antiJapanese suspicion and fear led the Roosevelt administration to adopt a drastic policy toward these residents, alien and citizen alike. Virtually all Japanese Americans were forced to leave their homes and property and live in camps for most of the war. The government cited national security as justification for this policy although it violated many of the most essential constitutional rights of Japanese Americans.
Both the Office of Naval Intelligence and the Federal Bureau of Investigation had been conducting surveillance on Japanese Americans since the 1930s. After the Pearl Harbor attack, these two agencies, plus the Army’s G-2 intelligence unit, arrested over 3,000 suspected subversives, half of whom were of Japanese descent. As far as the agencies were concerned, the remaining Japanese American population did not pose a significant threat to national security.
The public, however, was not convinced. Japanese victories in Guam, Malaya, and the Philippines helped fuel anti-Japanese-American hysteria, as did a January 1942 report claiming that Japanese Americans had given vital information to the Japanese government ahead of the Pearl Harbor attack. Many Pacific Coast citizens worried that local Japanese Americans might help the Japanese military launch attacks in their region. Walter Lippmann, a journalist whose columns were carried by newspapers across the United States, argued that the only reason Japanese Americans had not yet been caught plotting an act of sabotage was that they were waiting to strike when it would be most effective. Another influential columnist, Westbrook Pegler, put it more bluntly: “The Japanese in California should be under armed guard to the last man and woman right now and to hell with habeas corpus until the danger is over.”
Despite the growing public pressure to act, government officials were uneasy about incarcerating Japanese Americans, especially those who were citizens, without a clear reason. Neither Attorney General Francis Biddle nor Secretary of War Henry Stimson believed the removal would be wise or even legal. Military leaders, however, as high up as Assistant Secretary of War John J. McCloy, insisted that this policy was absolutely necessary to ensure public safety on the Pacific Coast. Between the public demand for action and pressure from the military, Biddle buckled and told Stimson he would not object to a wholesale removal of Japanese Americans from the region. Stimson advised Roosevelt accordingly, and on February 19, 1942, the President signed Executive Order 9066, which directed the War Department to create “military areas” that anyone could be excluded from for essentially any reason.
The new order gave the military the authority it needed to remove individuals of Japanese descent from the Pacific Coast, but where would they go? Federal officials hoped that these individuals might be able to find work as farm laborers, but many state and local authorities made it clear they did not want Japanese Americans moving into their areas. The governors of Montana and Wyoming feared it would spark racial violence. “Our people cannot tell an American-born Japanese from an alien,” said Montana Governor Sam C. Ford. “When casualty lists start coming in…I fear for the safety of any Japanese in this state.” Idaho’s Attorney General, Bert Miller, was less sympathetic. “We want to keep this a white man’s country,” he said. “All Japanese [should] be put in concentration camps for the remainder of the war.
