Unit roster

The current units are:

Spearguard — requires barracks, level 1.
Sun Archer — requires barracks, level 2.
Siege Ram — requires barracks, level 3.
Azure Galley — requires harbor, level 1.
Wind Scout — requires harbor, level 2.
Cargo Barge — requires harbor, level 2.
Heavy Warship — requires harbor, level 4.
Sea Interceptor — requires harbor, level 3.