UFC 100 at Mandalay Bay Events Center

UFC 100 was held on July 11, 2009 at the Mandalay Bay Events Center in Las Vegas. The event featured headline bouts including Brock Lesnar vs. Frank Mir and Georges St-Pierre vs. Thiago Alves and was one of the promotion's highest-profile shows at the time. UFC 100 drew a large live crowd and significant pay-per-view buys, marking a milestone for mixed martial arts in Las Vegas.