Emergency save is just a name I use for an alternately named save that I make if I'm about to do something that might result in a CTD. In this case, it didn't work out too well and I ended up just redoing the turn, because saving when you have a "pick your ally" scroll minimized just results in a buggy save where the game automatically cancels your alliance with one of the parties on YOUR allies screen, shows you as still being allied on THEIR allies screen, but shows both parties still remaining allied when you mouse over a settlement belonging to either party on the map. Sounds to me like a save corrupting CTD waiting to happen, so I redid the turn making the exact same moves as I did before.