We can look back to Russia's sacrifices there. They threw so many men into the meat-grinder that was the Eastern Front... It's hardly surprising that they employed a lot of women in heavy industry after the war.
BTW, just a historical point that few Americans know about. The Russians were poorly provisioned in WWII, and when they swept through Latvia and other small countries, their army stripped root-cellars and smoke-houses for food and slaughtered horses, cows, etc, leaving farmers destitute. My friend's father, uncles, and grandfather resisted, and were all shot. He and his mother and an aunt managed to escape and over the course of a year or so, made it across Europe and were allowed to emigrate to the US. When Kredo would hear of a Latvian being accused of being a Nazi war-criminal, he would always say "We hated the Nazis, but after what the Russians did to us, every able-bodied man wanted to join up and kill as many Russians as possible." According to him, the Latvians were so reckless and wild for revenge, the Germans used them as shock-troops and sent them in first.