Uhhhh....
Someone may have touched on the effects on their male peers if this happens. I'll expand on that since I have seen this in the Navy at some level.
Back in the day (generally pre-2000), women were not typically assigned to combat ships (e.g. carriers, destroyers, amphibious assault etc.). So they ALL pretty much ended up on non-combat "support" ships. I was stationed on such a ship which was 50%+ women. With that many women, there are bound to be some fairly decent (7 max) ones but not much higher and the amount of cute ones is <10%.
So... let me tell you, these chicks were SLUTS. There were many women that slept with multiple guys. If you wanted to get your dick inside them, you could pretty easily. If you weren't a disgusting slob, it was a go. A lot of them did it to get pregnant so they could avoid deployments. The pregnancy thing happened so often that it wasn't funny. I still remember a girl I liked on the ship and she liked me. However, since I was a betamax, she ended up getting fucked by one of the dirtiest dudes on the boat and also became pregnant by him. I was sad at the time and wish now I had RVF in the ocean to dry up my tears

. Once these chicks left the ship, a lot of times it left a key gap in their role on the ship. I mean some were electricians and qualified support people. It just meant more work for the men if they couldn't replace the person in time. Pretty fucked up.
So, point being that the women that will join are women that will be the dumbest and biggest sluts on the planet that just want to be empowered and ride cock. What better place to ride cock than the cockfest that is the military. The leadership is stupid enough not to realize this and don't even know what it will do to morale or headcount.
I see no good coming from this.