In a document categorized as secret from September 1944, Messerschmitt requested 2,000 prisoners from Natzweiler concentration camp. These prisoners were supposed to be used for aircraft construction in the Leonberg sub-camp. In addition to skilled laborers, such as metalworkers and electricians, the company needed 1,400 prisoners to train. The SS Chief Economic and Administration Office (WVHA) which was responsible for this approved the transfer “starting immediately.” Messerschmitt had to pay the concentration camp or the WVHA 6 Reichsmarks for skilled workers and 4 Reichsmarks for unskilled workers.