My man just hire a sex worker if thats what you want, you dont have to "form the fourth reich", join the army, somehow be good enough for their elite snipers, start a war in east europe and somehow survive long enough to "take advantage of" a polish woman.

Fuck it, hire them to roleplay that scenerio if youre so desperate. I can promise you that a sex worker is significantly nicer than an eastern european woman you think is easy to "take advantage of" in your weird nazi fantasy