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, broadcasted live on pay-per-view in the United States, and 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.

Preliminary card

Welterweight bout
Nick Thompson vs. Keith Wisniewski
Thompson defeats Wisniewski by unanimous decision. This preliminary bout was not aired on the broadcast.

Welterweight bout
Thiago Alves vs. Ansar Chalangov
Alves defeats Chalangov by technical knockout by strikes at 2:25 of round one. The bout, although preliminary, was aired on the broadcast.

Light Heavyweight bout
Sam Hoger vs. Jeff Newton
Hoger defeats Newton by submission (rear naked choke) at 2:05 of round two. The bout, although preliminary, was aired on the broadcast.

Main card

Middleweight bout
Jeremy Horn vs. Trevor Prangley
Horn defeats Prangley by close unanimous decision, to which the crowd responded with mixed reactions.

Welterweight bout
Georges St. Pierre vs Sean Sherk
In one of the more anticipated bouts of the evening, Georges St. Pierre defeats Sean Sherk by technical knockout by strikes at 2:53 of round two.

Welterweight bout
Matt Hughes vs Joe Riggs
UFC Welterweight Champion, Matt Hughes defeats Joe Riggs by submission (kimura) at 3:28 of round one. Riggs was brought in as a replacement for Karo Parisyan, who suffered an injury in his training leading up to the bout. Although originally scheduled as a championship match, Riggs could not make the required weight at 170 lb (he came in at 171 lb) and the bout was changed to a non-title welterweight match, where there is a 1 lb allowance.

Heavyweight bout
Gabriel Gonzaga vs. Kevin Jordan
In the evening's swing bout, Gonzaga defeats Jordan by knockout at 4:39 of round three. Despite the exciting finish, the bout was uneventful up to that point, inciting boos from the audience and criticism from the ringside announcers.

UFC Middleweight Championship
Rich Franklin (C) vs. Nathan Quarry
In the main event of the evening, Middleweight champion, Rich Franklin, defends his title and defeats Nathan Quarry by knockout at 2:34 of round one.