If you mean, when did middle-class women in western Europe and the USA start to go out to work, they started in the mid-to-late 1800s, doing jobs such as teaching in schools, or working as 'typewriters' (originally the name for the people who used the machines, not the machines themselves). But it wasn't until the first world war that quantities of women started going out to do work previously done by men, because the men were almost all away fighting. Your question is FAR too vague.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.