Bruks Big Book Of Tactics

Chapter 1

Have more guys than your opponent

Chapter 2

Have better weapons than your opponent

Chapter 3

Get there first. Pick your terrain.

High ground is good, especially if you have Archers.

Chapter 4

Logistics is the key to victory. Things always take longer than you think they will.

Chapter 5

Sieges take time. Plan to build your siege engines early.