If it's the ... thing that bothers you it's well known that the numbers of ... men in the military has not changed and there is no reason to think it was any different in the past. Many famous soldiers have been known to be homosexual.
In my own experience in the British army there were always ... men serving. When it was illegal they had to be discreet but everyone knew and as long as they did not make unwanted advances ( and why would they) a blind eye was turned to the issue.
I would also say any military does and should reflect the society it protects and serves. If society is tolerant to homosexuality then the military should be to. Don't blame the military for this blame the society. It also as far as I know has absolutely no impact on the perormance of the military so in the end who cares!
Speaking as a former Sailor who served with the US Marine Corps I can say that most of the stigma against homosexuality is based on the fear of them using their status to become protected. It happens already with minorities and women, if they show up late for work or do something stupid and you try to chew them out, they threaten an Equal Opportunity complaint. Few do it but enough that at this point, especially in intersex units, commanders leave the door open and have witnesses sit in on all meetings with subordinates, in order to avoid false accusations. So the idea that suddenly they become "enfranchised" to act out at the same time all the leadership within the military becomes scared that they will be on the chopping block for cracking down on the latest presidential decreed victim of oppression.
The other issue isn't so much being ... (everyone knew someone that was ... and kept it on the down low), it was the effeminate ... males that nobody wanted. The military is a macho environment because it has to be, its all about fighting wars, there are few jobs that can be done by weak willed people. Servicemen or women who are protected from getting in trouble, who can act as overly effeminate as they want with nobody allowed to even say "Hey, maybe you should tone that down a bit" without catching a career ending complaints, that hurt a unit's morale and lower its effectiveness.
Most men I met were happy to serve with lesbians, I've had nothing but good experiences with them. They can take a joke, they aren't afraid to get their hands dirty, and often they like the same ...... we guys do, so we have something in common to talk about.