Much has been written about the World War II Japanese internment camps. After the Japanese attack on Pearl Harbor, the government was gravely concerned about the possibility of Japanese government agents residing in the United States. While this might have been a reasonable fear at the time, the steps taken were extreme. More than 110,000 people of Japanese ancestry were forced into internment camps – whether or not they were American citizens.
What I did not realize until recently is that once the United States entered World War II, it also created German and Italian internment camps.
Google Search brings up some interesting reading about this little known slice of history.
For a broad overview, here are some Wikipedia links.