The argument against women in combat is generally two fold: 1. Women are generally not pohysically as strong as men and are less able to carry weapons, supplies and the wounded. 2. It is much more psychologically damaging for men to see women burned, broken and blown up in combat. It may be hard for women to understand, but for a young man to have an attractive young woman in his unit, then see her step on a mine or get machine gunned - I think that would be so much worse than seeing it happen to other men. A lot of men, and I think especially men who would lean towards the military, see themselves as protective of women in the classical, chivalrous sense. Even if they act like jerks sometimes, most guys will agree that "you dont hit girls" and stuff like that. Watching "girls" get shredded in front of you would destroy a part of you that needs to imagine that the danger is to protect all that is good back home - pretty girls, apple pie, pickups and puppy dogs, etc. I think some guys would just be undone by that experience. Disclaimer: never in the military, the above is just speculation based on my understanding of human nature in America.