The first Nazi concentration camp opens in Dachau (Germany) in March 1933. The camp, located on the grounds of an abandoned munitions factory, is described as a "the first concentration camp for political prisoners." Over time, it interns other groups, such as Jehovah's Witnesses, homosexuals, “asocials”, and Jews.
View of the barracks and ammunition factory at Dachau concentration camp in Germany. This is one of the first photographs taken of the camp soon after it opened in spring 1933. (United States Holocaust Memorial Museum)