GM Zim.
Let me say this about what you thought and wrote.
You are mostly correct.
Where I would disagree is the unit wanting to have relations with them on the battlefield.
1. There is no time.
2. when you are in a battle there really ain't many places one is safe from getting hit much less doing that with a female soldier.
Its more likely that both would be shot and killed.
As for the down times at base camp between patrols I can't speak about. Anything can likely happen.
IMO, they would be a serious distraction.