The Greek Fortress is a strong defensive building that can be garrisoned by troops. Garrisoned units add to the firepower of the Fortress. You may also train unique units, heroes and siege weapons and research military improvements at the Fortress.

The first great civilization in Greece, the Mycenaean of Trojan War fame, was a collection of city-states, each centered on a hilltop fortress. The competition between the city-states for farm and orchard lands, plus the threat of barbarian raids from the north, made strong defense critical for survival. The typical Fortress used cliffs, stone walls, strong gates, and winding, exposed approaches to create a powerful defensive position. In addition, the Fortress functioned as a palace, armory, and administrative center for many cities.