The thing about the military is, once you join, you don't get to decide whether you fight for this kind of oil imperialism -- it's follow orders or go to military prison. (You might, separately, be able to sue from military prison claiming the orders were illegal, but good luck with that.)
I thought you could resign your commission or something? I've heard of that.
I'm not in the military of course and I couldn't be, I'm not a team player and tou unstable, I would spiral out of control in such an environment. But I thought there were ways of getting out of it.
You definitely don't get to just quit.