UFC 56: Full Force was a mixed martial arts event held by the Ultimate Fighting Championship on November 19, 2005. It was held at the MGM Grand Arena in Las Vegas, Nevada, broadcast live on pay-per-view in the United States, and later released on DVD.

Headlining the card were the two coaches from The Ultimate Fighter 2, Rich Franklin and Matt Hughes, scheduled to defend their middleweight and welterweight titles, respectively. This event marked the first time that an Ultimate Fighter contestant, season one's Nate Quarry, would compete for a UFC championship. Two highlight reel knockouts including the devastating knockout of Nate Quarry were performed during UFC 56.

UFC 56 drew a live gate of $1,986,600, with 9,995 tickets sold. The total fighter payroll for the event was $294,000.

Matt Hughes: $110,000 ($55,000 to fight; $55,000 to win)

Jeremy Horn: $50,000 ($25,000 to fight; $25,000 to win)

Georges St-Pierre: $35,000 ($16,000 to fight; $19,000 to win)

Rich Franklin: $26,000 ($13,000 to fight; $13,000 to win)

Joe Riggs: $12,000 (Note that Riggs was fined 10% of this amount for failing to make weight)