Answer:
In his speech to Congress, President Franklin Delano Roosevelt declared that the Japanese attack on Pearl Harbor on December 7, 1941, was "a date which will live in infamy." The attack launched the United States fully into the two theaters of World War II. Prior to Pearl Harbor, the United States had been involved in the European war only, by supplying England and other anti-fascist countries of Europe with munitions.
The attack on Pearl Harbor also launched a rash of fear about national security, especially on the West Coast. In February 1942, just two months later, President Roosevelt, as commander-in-chief, issued Executive Order 9066 that resulted in the internment of Japanese Americans. The order authorized the Secretary of War and military commanders to evacuate all persons deemed a threat from the West Coast to internment camps, that the government called "relocation centers," further inland.
Prior to the outbreak of World War II, the Federal Bureau of Investigation (FBI) had identified German, Italian, and Japanese aliens who were suspected of being potential enemy agents; and they were kept under surveillance. Following the attack at Pearl Harbor, government suspicion arose not only around aliens who came from enemy nations, but around all persons of Japanese descent, whether foreign born (issei) or American citizens (nisei). During congressional committee hearings, representatives of the Department of Justice raised logistical, constitutional, and ethical objections. Regardless, the task was turned over to the U.S. Army as a security matter.
The entire West Coast was deemed a military area and was divided into military zones. Executive Order 9066 authorized military commanders to exclude civilians from military areas. Although the language of the order did not specify any ethnic group, Lieutenant General John L. DeWitt of the Western Defense Command proceeded to announce curfews that included only Japanese Americans. Next, he encouraged voluntary evacuation by Japanese Americans from a limited number of areas; about seven percent of the total Japanese American population in these areas complied. On March 29, 1942, under the authority of the executive order, DeWitt issued Public Proclamation No. 4, which began the forced evacuation and detention of West Coast residents of Japanese-American ancestry on a 48-hour notice. Only a few days prior to the proclamation, on March 21, Congress had passed Public Law 503, which made violation of Executive Order 9066 a misdemeanor punishable by up to one year in prison and a $5,000 fine.
Because of the perception of “public danger,” all Japanese within varied distances from the Pacific coast were targeted. Unless they were able to dispose of or make arrangements for care of their property within a few days, their homes, farms, businesses, and most of their private belongings were lost forever.
From the end of March to August, approximately 112,000 persons were sent to “assembly centers” – often racetracks or fairgrounds – where they waited and were tagged to indicate the location of a long-term “relocation center” that would be their home for the rest of the war. Nearly 70,000 of the evacuees were American citizens. There were no charges of disloyalty against any of these citizens, nor was there any vehicle by which they could appeal their loss of property and personal liberty.
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