Total War rocks. Medieval II Total War ftw.
Quote: "In Total War you have to think about morale, fatigue, high ground, unit pace, unit vs unit effectiveness, combination, exactly when to release a unit and along what route, and you spend a lot of time maneuvering troops into position to execute precise attack/defence strategies"
I just make up huge armies and sic them on my enemies.
The only strategy I use is this:
Sword Infantry against Spear Infantry
Cavalry against Sword Infantry and Archers
Spear Infantry against Cavalry
Archers against Sword and Spear Infantry