Chariot racing was very big business in ancient Rome. There was a whole industry built around the factions, the four professional stables known by their team colour – Blue, Green, Red, and White –, providing all that was required for a race: horses, stable managers, blacksmiths, doctors, assistants to the charioteers, operators for the gate starting mechanisms.
This is a companion discussion topic for the original content at https://www.worldhistory.org/article/2150/chariot-racing-in-ancient-rome/.