The Nazis worked toward their goal of “annihilation through work” by means of forced labor that was “often pointless and humiliating, and imposed without proper equipment, clothing, nourishment, or rest.” Throughout the Holocaust, over seven million forced laborers considered “fit for work” by SS officials were sent to work endless hours in munitions and aircraft parts factories, stone quarries, brickmaking sites, coal mines, and other industries to manufacture goods and supplies for the German war effort; Flick, I.G. Farben, BMW, Siemens, Messerschmitt, Daimler-Benz, Krupp, and other industries vital to the war effort became filled with camp prisoners.