The Ultimate Fighting Championship (later renamed UFC 1: The Beginning) was the first mixed martial arts event by the Ultimate Fighting Championship (UFC), held at the McNichols Sports Arena in Denver, Colorado, United States, on November 12, 1993. The event was broadcast live on pay-per-view and later released on home video. The event was the lowest profile by the contemporary standards. The venue was less than half-packed, and the grand prize of the tournament was as big as a regular sparring partner's biannual salary.
https://en.wikipedia.org/wiki/UFC_1