Goblin-Streitwagen (Civ4 FFH)
This unit is an orcish version of the one it replaces. It is weaker, but cheaper and does not require a Horse.
Charioteers are fast, nimble and murderous. Although primarily just platforms for carrying warriors into battle, they can hunt down all but the fastest of units and bring the fight to them.
The chariot is the earliest available Tier 3 unit. It requires a Siege workshop and the Horse resource to be built. Since the Siege workshop can make Catapults as well, civilizations that rush to the techs required for both can have an army capable of high movement, strong city attacking, and Tier 3 unit strength while most other civilizations are still using Tier 2 units. Chariots can be upgraded to War Chariots and War Elephants.