Though Austrians made up only 8% of the population of the Third Reich, some of the most prominent Nazis were native Austrians, including Adolf Hitler, Ernst Kaltenbrunner, Arthur Seyss-Inquart, Franz Stangl, Alois Brunner, Friedrich Rainer and Odilo Globocnik, as were over 13% of the SS and 40% of the staff at the Nazi extermination camps. In the Reichsgau, besides the main camp KZ-Mauthausen, there were numerous sub-camps in all federal states where Jews and prisoners were killed, tortured and exploited. At this time, because the territory was outside the operational radius of the Allied aircraft, the armaments industry was greatly expanded through the use of concentration camp prisoners and forced labor, especially for fighter planes, tanks and missiles.