Chariot racing was a popular sporting event in ancient civilizations such as Greece, Rome, and Egypt. While chariots were originally designed for use in warfare, they were also used for transportation and as a way to show off wealth and status.
In Ancient Greece, chariot racing was a popular event at the Olympic Games and other public festivals. The sport was also popular in Rome, where it was a central part of the Roman Games (Ludi Romani). Chariot racing was a dangerous and exciting spectacle that drew large crowds.
It's likely that chariot racing became a sporting event because of the appeal of fast-paced, high-stakes competitions and the opportunity for individuals or teams to showcase their skills and strength. The chariot's association with warfare and the social status of its drivers and owners may have also contributed to its popularity as a sporting event.