The chariot is the earliest and simplest type of carriage, used in both peace and war as the chief vehicle of many ancient peoples. Chariots were built in Mesopotamia by the Mesopotamians as early as 3000 BC and in China during the 2nd millennium BC. The original chariot was a fast, light, open, two- or four-wheeled conveyance drawn by two or more horses hitched side by side. The car was little else than a floor with a waist-high semicircular guard in front. The chariot, driven by a charioteer, was used for ancient warfare during the Bronze and Iron Ages, armor being provided by bronze shields. The vehicle continued to be used for travel, processions and in games and races after it had been superseded militarily.
The word "chariot" comes from Latin carrus, which itself was a loan from Gaulish. A chariot of war or of triumph was called a car. In ancient Rome and other ancient Mediterranean countries a biga was a two-horse chariot, a triga utilized three horses and a quadriga was drawn by four horses abreast. Obsolete terms for chariot include chair, charet and wain.
The critical invention that allowed the construction of light, horse-drawn chariots for use in battle was the spoked wheel. Most horses at the time could not support the weight of a man in battle. As horses were gradually bred to be larger and stronger, chariotry (the part of a military force that fought from chariots) gave way to cavalry.