Women in the military has, or at least would be, a disaster for reasons that should be obvious to all. They create sexual rivaly, they get knocked up, they require wasteful duplication of quartering and medical facility, and they're really just not cut out to be soldiers in the first place either physically or mentally.
Unit cohesion is not a bullshit argument, and it is one of the most important assets of warfare. In nearly every war it has been found that more homogeneous units are less likely to desert or break in battle and more willing to take lethal risks for their unit. For instance, the most successful units in the Civil War were those in which the soldiers came from the same communities and had similar professions. This is why boot camp exists in the first place: the idea is to break down the individual identity of the soldier and integrate him into the collective military identity.
For instance, in the U.S armed forces unit cohesion is severely undermined by subversive liberal ideology. Fortunately for them, they haven't had to fight a serious war in a long time. The last time they did, their units were consistently less successful than that of their main opponent (Germany) which had significantly more homogenous units and did not rotate individuals around like raw materials.
Unit cohesion should be at the heart of armed forces personnel management policy, not a minor issue to be sidelined for harebrained politically correct fads. There exists a very large body of data from diverse disciplines including evolutionary psychology (Philippe Rushton's genetic similarity theory), sociology (Robert Putnam's work as the quintessential example), military science (applied research about unit success), etc, showing that homogeneous groups have significantly higher levels of trust and cooperation. This should surprise no one except the fucking retards who have swallowed the diversity-is-strength lie.
Feminists and liberal equalitarian and equal rights worshippers can fuck off.