The correct answer is women entered the workforce in large numbers to replace the men.
Women's participation in warfare has always been diverse, they have worked behind the scenes and also on the front lines, engaged in violent struggles, directed tanks and ambulances and were workers in the arms and ammunition factories, but despite so much activism, in the early 1930s they still had no the right to vote.
Despite the women having fought, worked both as nurses and as pilots of airplanes, or to cheer up the troops, or even infiltrate clandestinely and collect strategic information. Women endured all sorts of atrocities typically committed in war, concentration camps, bombing fires and even the nuclear bomb.
This modest text addresses different roles and women, and makes us conclude that World War II was a conflict of men and women. And, it was the occasion when many women from different countries were asked to contribute to the war effort.