The reason women have not been allowed in the army until recently has not been to protect women from harassment. Rather has it been to ensure the squad morals and teawork are as high as possible. If a man has his girlfriend in the squad he will do the most stupid of things to protect her, ruining all tactics and strategy. I believe there have been simulation of war with a "mixed" squad and the men ended up throwing themselves infront of them to take the bullets. The same goes for why homosexuals were left out; loving relationships in the military are disastrous for the squad.