UFC 77: Hostile Territory was a mixed martial arts event held by the Ultimate Fighting Championship (UFC). The event took place on Saturday, October 20, 2007, at the U.S. Bank Arena in Cincinnati, Ohio.

Heritage Bank Center is an indoor arena located in downtown Cincinnati, next to the Great American Ball Park. It was completed in September 1975 and named Riverfront Coliseum because of its placement next to Riverfront Stadium. In 1997, the facility became known as The Crown, and in 1999, it changed its name again to Firstar Center after Firstar Bank assumed naming rights. In 2002, following Firstar's merger with U.S. Bank, the arena took on the name U.S. Bank Arena and kept that name until 2019.