On February 19, 1942 the President of the United States issued Executive Order 9066 - the order that set in motion the process whereby 120,000 mostly US citizens of Japanese descent were interned in camps for the remainder of the Second World War. The majority of those interned were natural born US citizens. In addition a significant minority were resident aliens or naturalized citizens. Finally, a small minority were German-American and Italian-American.
Following his arrest U.S. citizen Fred T. Korematsu challenged this order, and had his challenge go all the way to the U.S.
