David Lesher wrote:

German POW's held in the US. I recall reading the Army shipped most
into the Midwest. (I know there was one camp in Sandusky OH area.)

Reportedly a German POW camp located near the massive U.S.
Army Sioux Ordinance Depot approximately 20 miles from Sidney,
Nebraska. When WW2 started the installation provided hundreds of
earthen bomb storage bunkers dotting the prairie, in addition to a
vast complex of warehouses that were used throughout WW2, Korea and
Vietnam. In 1967, most of the complex was turned over to area
farmers/ranchers and a community college (where I received my A&P
mechanic certificate in 1983).

-Mike Marron