Quote Originally Posted by rockoutloud1213
I'm not nearly as good with battles in Medieval as I am in Rome, so I usually auto-resolve. Any idea how 1 defender in Bulgaria killed 475 besiegers all by his lonesome?
They added a quite linear system to make sieges more expensive to auto-resolve. Simply put 472 of your attacker died to the automatic defense.

Otherwise you could take a well manned fortress with almost 0 losses by a simple huge overpowering.