In fantasy based games, I have always found that humans are the least interesting faction. I never liked painting human figures, and never wanted to play them.
Then when the Kings of War Historical rules came out, I built demo armies for Romans and Celts, and my feelings changed a bit.
Because of the sheer number of historical wargaming miniatures, Mantic Games has never planned on making any miniatures for their Kingdoms of Men faction - instead providing rules but recommending any of the excellent historical miniatures for these.
Mantic based their fantasy naval combat game Armada after the Warlord Games historical naval combat game Black Seas. As such, the base of all the fantasy ships are the historical ships. However rather than design and create yet another version of historical ships, it made sense for them to simply make the statistics for the existing ships that the rules were based on.
Warlord actually sells Armada on their web site, and to support using their ships in Armada, Mantic has created Kingdoms of Men faction cards, which is also available from Warlord games.