1) Load this saved game.
2) Press end of turn button. The game become extra slow.
3) After some time a window will open asking if I want to combat some troops. Press auto resolve.
4) After some time a window will come with battle results. Click OK
That's it. The game never finishes "end of turn" processing and VERY slow. Overall the performance of the game was quite good until like 5 turns ago, when it suddenly become worse and worse, and now, it can not even finish end of turn (well, if I wait long enough it may finish, but after 3 minus I gave up, one should not wait that long)