The answer would be, The role of women in world war 1.
Short explanation : Most of the men were at war and and the woman had to start working/get jobs. Women typically around WW1 were seen as housekeepers, and only house keepers, and society did not believe that they could hold steady jobs.
When King Menes united the kingdoms of Upper and Lower Egypt by establishing a succession of rulers from the same family, he founded the first Egyptian dynasty.