[@neogreggory] The A.I was quite abysmal in Medieval, but the Grand Campaign Mod (lets you play as loads of extra nations, and has a much bigger map) did a lot to help. Even so, if you go against an A.I army with third the strength of theirs, you will usually win. 

I'm using Shogun to decide the battles that have been asked for resolution. The A.I is better in that, probably the best out of all of them, though it still has its flaws (sometimes the general runs ahead of the army and suicide rushes the center mass of the opposing army!?). 

You should see what they did in Rome 2. I will never forgive CA for the monumental fuck up that was Rome 2. That was the last game I ever pre-ordered. You want bad A.I? Holy shit, Rome 2's A.I was actually retarded. Like, proper retarded - offensively retarded. We're talking the entire enemy army just walking through your army - without even trying to fight - just to get to some magical flag on the battlefield that made whoever held it the victor. 

Total fucking trash. URGH. Now I'm angry.