For myself I'd join the women.
Even not being passable yet I'm sure they'd accept me. Then I'd pretend to be on the male side, leak valuable information and create lies and rumors amongst the male side, use counter-intelligence to fuel the male battle plans and ensure I held the code to the nuclear weapons. Then tell each of the men that his particular wife slept with any male in his unit that he had an issue with, causing the men to fight, which would cause a chain reaction in which they would choose sides based upon loyalties.
Let's face it, give men a reason to fight and they will!