In my really big game the Ukra-Tal (turn 18-19)wanted a military alliance. I was about to hit accept when I recalled the beating they are taking from the Krill who use torpedos. Also I wanted their ice colony, and I figured they needed organics for their weapons. I was 1/4 full radioactives and running a deficit but half full organics running a surplus. So I offered to trade them my (ruins tech) gas colony plus point defence V plus 200k organics and military alliance in exchange for ice colony and 200k radioactives. They accepted! I suppose I could have replayed until I found the minimum trade but that was good enough for me....

If you refuse a treaty there is a penalty but I presume if you offer a counter proposal trade that includes the requested alliance and the AI turns it down there should be no penalty. So ask for the moon to avoid treaties greater than TR. Does anybody know how many points for trading purposes the MA was worth in my trade above ?