I cant remember the name of an old pc strategy game!?

in the game you controlled an army of knights colored blue and the enemy had knights colored red.in some stages you had to destroy the enemy's flag while in others to destroy the castle.i remember in one stage there being a river in the middle with a bridge and on the right a mill . in he bottom it was me (with the blue Knights ) and in the top it was the pc(enemy with red Knights) . each side had a king that was more powerful than the other knights.plz!