From the outset of the war, it was clear that enormous quantities of airplanes, tanks, warships, rifles and other armaments would be essential to beating America’s aggressors. U.S. workers played a vital role in the production of such war-related materials. Many of these workers were women. Indeed, with tens of thousands of American men joining the armed forces and heading into training and into battle, women began securing jobs as welders, electricians and riveters in defense plants. Until that time, such positions had been strictly for men only.