 Complete the following phrase:  During World War II, Kassel was the headquarters for Germanys Wehrkreis IX, and a local subcamp of Dachau concentration camp provided forced labour for the Henschel facilities, which included tank production plants. The most severe bombing of Kassel in World War II destroyed 90 of the downtown area, and some 10,000 people were killed and 150,000 were made homeless. Most of the casualties were civilians or wounded soldiers recuperating in local hospitals, whereas 