Many women were working in the factories due to the men being out at war during World War 2. They were creating things like grenades to help with the war effort.
The army that was fighting was not only whites. Soon enough, African Americans were able to join and help the U.S win the war.
Because all the men were out to war, the women found jobs they wouldn't be able to get otherwise. Those jobs were paying lots of money to the women for their families, and the economy didn't break down as a result.
However, the jobs that they worked were very dangerous and many women died every year due to these dangerous jobs.
However the African Americans did the same work as the white men, they were still segregated and not congratulated when returning home.
Women lost their jobs after World War 2 because the men were back. They didn't get any praise and continued housekeeping afterwards.