Lots of young men were Drafted into WWII (I'm pretty sure around 15million volunteer/draft), this left lots of children and woman to take care of the US, this meant that Women were encouraged to go to factories to help for war efforts, this also brings in the picture of Rosie the Riveter, this was a new picture of women since Rosie is a tough factory worker girl, when back then girls were known as housewives.
It was a protest march where some 250,000 people gathered in front of the Lincoln Memorial for jobs and freedom. The match rallied Americans to to stand up against continuing political and social injustices African Americans faced.