On February 19, 1942, two months after the bombing of Pearl Harbor, President Franklin D. Roosevelt signed Executive Order 9066, which authorized the US Army to physically remove all persons of Japanese ancestry from the West Coast and imprison them, without due process of law. Over 120,000 Japanese Americans were given a week’s notice to put their affairs in order and abandon their generational homes, livelihoods, friends, and family. They brought only what they could carry, reporting to ten temporary detention centers, many built on local fairgrounds and racetracks. The earliest of them, Manzanar, CA opened in March of 1942 and the last, Rohwer, AR closed in November 1945. See https://www.calstate.edu/csu-system/news/Pages/csu-archives-collaborate-to-document-japanese-american-incarceration-in-california.aspx and https://csujad.com/