Quote Originally Posted by TinCow View Post
The siege AI is heavily bugged and it encounters serious problems assaulting a castle with multiple stacks. The first stack always attacks properly, but reinforcing stacks often sit and do nothing. I would estimate this occurs in about 75% of my multi-stack siege defenses.
I encountered that for the first time tonight. I found that the AI would wake up if I send a unit near enough, although it would only follow and attack the unit I used as bait. It would not try to scale the walls or attack the units inside.

After the battle I was awarded the achievement for winning 20 MP naval battles. I have never played a single MP game and I hate naval battles!