After the Japanese attack on Pearl Harbor on December 7, 1941, hostility and suspicion towards people of Japanese descent in the United States intensified. On February 19, 1942, President Franklin Roosevelt signed Executive Order 9066 authorizing the placement of Japanese Americans and Japanese resident aliens in internment camps. It was the single largest forced relocation in U. S. history. One such camp was established in South Central Idaho near the town of Jerome. Today, the remains of the camp is a newly-authorized National Historic Site without visitor facilities as yet.