One really fun thing you can do with Warsong is stick around in the castle in the first battle (rather than slinking off like a whipped dog like the game wants you to) - you can sometimes actually defeat all of the enemy (a lot of being able to win relies on how well the king's two guards do - which you have no control over). It doesn't change the subsequent gameplay at all other than giving you a bit more money for the second scenario and a bit more experience.