Pretty much what the title says. I can play this very stable the first hours without any problem at all and my fps stays at around 40-50 with no lag.
However, after a few hours of playing as the armies get stronger, i get massive fps lag and it drops around 5 frames. Is this because the armies grow so enormous or is it because of sommething else? If it is because of the army sizes, is there any way to put a limit on how big they could be?