So I sack an Iroquois city with little resistance. I went another couple of rounds and quit, thinking I had saved post-battle. Turns out my last save game was right before my assault. But this time, there are a host of new military units that were't there before. An extra archer, a couple more of those UUs they have and a bunch of knights I didn't have to deal with the time before. Is that a thing done intentionally to discourage saving to test an upcoming fight? I know it sounds strange, but I'm telling you, there were a lot more enemy units than when I did it the first time.