Thanks for all the replies those are some great units, without those I don't think the game would have nearly the same longevity. What's more fun then watching humans and horses get tossed skyward by a nice charge.

Just played as the British and those Head Hurlers might just be the best artillery/light unit ever. Not only do they cause fear but their decently ranged limed heads CRUSH KATAPHRACTS!!! Plus they can close for the kill.

(note I like Kats)