UFC 100 at Mandalay Bay Events Center

UFC 100 took place at Mandalay Bay Events Center on July 11, 2009, and served as a landmark numbered event for the promotion. The card featured Brock Lesnar vs. Frank Mir and Georges St-Pierre vs. Thiago Alves among other high-profile fights. UFC 100 was widely promoted as a milestone show for mixed martial arts in Las Vegas.