Archaeologists are learning just how formidable Athens’ naval war machine really was after excavating parts of two of the three militarized harbors built in Piraeus. “We have identified, for the first time, the 5th century BC naval bases of Piraeus—the ship-sheds, the slipways and the harbor fortifications,” Bjørn Lovén, director of the Zea Harbor Project, which led the excavations. Lovén says the naval fortifications at one time housed about 400 fast and maneuverable ships called triremes. These vessels were tended to by 80,000 sailors and soldiers.