There is a martial arts dojo. Two women are there pretty regularly, a young adult woman and a middle aged woman. The older woman is a black belt instructor. The younger is an advanced beginner. Commendable and welcome.
However, the black belt woman instructor though a superb teacher of martial arts technique, is not much of a fighter. The younger woman martial artist has great technique, but lacks the size and power to make her excellently done techniques effective against even beginner adult male students.
In the Army, I served under a female Captain who was a superb officer (peace time Army, CONUS). We did have female soldiers. The young men soldiers were happy to have the young females. Much effort was made to keep the two groups separate, but not always with success.
I can see in combat, some real problems....guy: “I’ll carry your pack if you....” or “I’ll protect you if you....”
And there are the minor issues of bathroom needs, bathing, housing, not to mention the issues involved when you are a big guy and your buddy is a small woman...and you get hurt and need your buddy to carry your out of harm’s way, etc.
Saw this first hand at a deployed location. Female captain had to use the bathroom. She held it all the way from Iraq because she could not use the "honey bucket". On the C130 aircraft there is a "honey bucket" on the aft ramp. It has a screen but it only covers from shoulders down to about top of boot height if you are sitting. Your knees are facing the opposite side of the ramp and your right side is totally exposed but facing the closed ramp. If you are using the bucket everyone in the troop compartment can see what you are doing.
There is a urinal for the men behind the honey bucket.