Quote Originally Posted by Xurr
Sally, but don't. Basically what I would do is position my archers in range of the enemy army at the start of the battle. They will get off a couple of volleys and kill a bunch before the opposition runs out of range. Let the time expire and with the resulting draw. Do that a few turns and they'll eventually just retreat.
Although if it goes on too long, the FM in charge of the garrison starts getting some pretty negative traits about cowering behind walls.