1. The average weight of all of the supplies (including guns and ammo) would weigh around 100 pounds. Females have 30% less muscles than men and have smaller hearts, which makes it dangerous for women.
2. Women might have emotional break downs and mental issues when facing war for the first time. Making them serve differently would decrease emotional scarring.
3. Most women will be slower runners than men. The highest women record of the running in the Olympics would be completely different than the men's version.
Hope this helps! :) (no offense to the women)