Prisoner-of-war camps in the United States during World War II.
In the United States, at the end of World War II, there were 175 Branch Camps serving 511 Area Camps containing over 425,000 prisoners of war (mostly German). The camps were located all over the US but were mostly in the South because of the higher expense of heating the barracks in other areas. Eventually, every state (with the exceptions of Alaska, Nevada, North Dakota, and Vermont) had POW camps. Some of the camps had to be designated "segregation camps" and used to separate the Nazi "true believers" from the rest of the prisoners, whom they terrorized and even killed for being friendly with their American captors.
At its peak in May 1945, at total of 425,871 POWs were held in the US. This included 371,683 Germans, 50,273 Italians and 3,915 Japanese.