I think that the campaign AI is bad too. In my Byzantine campaign, I am holding Adana and Caesaria. I am at war with the Turks and he Egyptians. The Mongols arrive in Yerevan. They declare war on the Turks though they haven't moved and there was no Turkish army around. Instead of attacking the lightly (2-3 units max) Turkish cities (no turkish field army) they go south towards Edessa which is Egyptian. The Egyptians have about 4 armies running around this area plus strong garrisons. The Mongols do not attack Edessa. They do not attack Aleppo. They come all the way to Antioch!! No you would expect the Egyptians to do something. Concentrate those 4 field armies on the Mongols sieging Antioch and using the full stack of the city garrison fight a glorious battle. By the way, I have modded down the Mongols. Instead of 8+ stacks they now have 3 so they can actually be handled by the AI. Anyway, the Egyptians do absolutely nothing. They don't even move their armies. They Mongols starve the city out for 9 turns. In the 7 turn the Egyptians declare a crusade on Constatinople. I have an eastern army on the adana/antioch border and waiting. The Egyptians pass by the besieged Antioch. The Mongols do nothing!! They have 2 stacksof the best troops with amazing generals and they do nothing at all when an Egyptian army passes just by them. If that is not a sure sign that the campaign AI is pathetic, I don't what is.