i attack the scots in the 4rth turn. they have a full stack in edinburgh and 3 units on the tile sw of the city. i attack the 3 units and once in battle i get a message that the enemy reinforcements are delayed and it may be because my pc cannot support the arrival of additional units. which made me laugh because my pc is no slouch.
either way, i wipe out the 3 enemy units quickly and then the battle ends. i never have to face the full stack that was garrisoned at edinburgh. when i get back to the campaign map the scottish faction has been destroyed and edinburgh is occupied by a few units of rebels.
hurray for me but i still feel like i cheated.