Hi,
Given the fact that this game is set in the late 70's, to increase my immersion, I have found a way of reducing the proportion of female soldiers that are generated in the game. BTW not sexist, just trying to recreate the conditions of that period, I have no issues with females in the modern military.
Open up the gameconfig.xml file and find the soldier generation variables section. In there you will find this:
<femaleSoldierChance value="35" comment="The percent chance that a generated soldier is a female" />
You can change the value to whatever you want. I have currently reduced this to 5 and it works pretty well.
Cheers.