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A Fortress is an upgraded fort that can be built when the population of the colony reaches 8 and already has a fort in place. The stout wooden barricade is reinforced and, in critical spots, replaced by stone masonry. Embrasures now house the artillery, which is more extensively used. Well-planned, overlapping fields of fire characterize the exterior approaches. A fortress overlooking the ocean will slow the progress of foreign vessels and open fire on them if they venture too close.

Colony with Fortress (Col)