I explained the situation, and asked that if he feels like continuing the war that he not start an alliance war because of my blunder and keep it between our two nations. I also said that if he wants peace, I can try to pay any reparations he wants. I'll give him until 1:50 game time tomorrow afternoon to reply (so roughly 17.5 hours)... if he doesn't reply by then, and he hasn't changed his troop numbers (and thus is inactive) I'll just finish the invasion off unless you have issues with that. He seems active though, so I should hopefully get a reply. I might have to praise the USA to switch over and give him troops if he asks for them, but since I am Mad Dog now (shame too, my original target was Pariah so I would have gained reputation) I would quickly fall out of line with them.
edit: Looking at his stats intensely, I really only see 3 possible scenarios. I mean the guy is pretty built:
http://bloc.name/stats.php?id=5521) He agrees to peace and wants troops, so I switch to Capitalist and give them to him.
2) He agrees to peace and wants reparations that I cannot possibly pay, seeing as how he is built and anything that is going to really matter to the growth of his nation is going to cost a lot.
3) He lulz at my small military compared to his large potential one, and destroys me, in which case I wholeheartedly would approve of you ejecting me from the alliance forcefully to save your skins.
I mean you could kick me out now, O Supreme Leader, seeing as how I did sort of break a rule, and technically would be breaking possibly 1 or 2 more if we have peace.