What sort of differences will we see in these Empire's Fleets? The Mongols, for instance, are likely to build a swarm of small ships and attempt to bury their opponents with numbers. The Romans would call their ships galleys and concentrate on land forces (they never were very swift at sea). The Norse, on the other hands, were explorers and bandits, operating in separate companies and only joining together for large objectives, and then only for loot. What other cultural differences will we see between these civilizations, and how will these differences affect their operations?