Knowing a fortress' layout can help your turn the battle to your advantage. Eacho fortress is essentially a residential area consisting of a large central command post surrounded by several barracks.
There are 5 types of barracks: post barracks, archers barracks, support barracks, officer barracks and a control center. The number of barracks varies depending of the size of the fortress. Eacho barracks has a commander who must be defeated in order for you to conquer that barracks. Note that the control center must have a Warsmith in order to handle the machinery.
"What will happen if I conquer the barracks?".