The Defense Department will house up to 20,000 unaccompanied migrant children on military bases in coming months, a Pentagon official said Thursday. ~ Washington Post, June 21, 2018
The first concentration camp specifically for murdering those the Nazis deemed subhuman, like Jews, was Auschwitz–Birkenau. Auschwitz was opened in 1940 in occupied Poland to hold Polish political prisoners. The Birkenau extermination camp annex was built in 1941. Fully operational, it could kill and cremate 20,000 people in a day.