No, women will never be able to “hang”. Ever. Unless they are genetically modified. I have never found a women who could throw 120 lbs on their bak and go road march and keep up; a lot of men can’t! That is just 1 small reason why it’s stupid to even think they could serve in the infantry or combat arms.Yep - they can develop strong legs, but the upper body strength that begins in the lower back just above the hips will never be able to compare. Without it, they are liabilities that make targets out of the men who will be torn between letting them die or risking all to protect them.
Everybody focuses on the physical differences - which is fine, since there are big differences - but the real issue is "magic". In a combat unit out by themselves, some of the members are going to develop relationships. The relationships cause the morale of the lucky few to soar while the morale of the unlucky many plummets. Further, those in relationships are loyal to each other first during crises - which is what combat contains abundantly. Worrying about your significant other causes distraction and divergence from mission and inequality in assignments. Morale and combat effectiveness further plummets.
I'm really tired of "experts" who tell me that it's a "leadership challenge". No, it's a bitter joke - nobody in their right mind would ever imagine putting 18-20 year old young men and women into a combat environment and expect them to remain professional and chaste. More likely, any unit with mixed sexes (or some gay networks) will fail horribly. That's reality.