UFC 148: Silva vs. Sonnen II was a mixed martial arts event held by the Ultimate Fighting Championship on July 7, 2012, at the MGM Grand Garden Arena in Las Vegas, Nevada.

The card's main event featured UFC Middleweight Champion Anderson Silva defending his title against Chael Sonnen in a highly anticipated bout.

"[10] The UFC Fan Expo (two days of fighter meet-and-greets, training seminars, a Grapplers Quest tournament, autograph sessions and other events) also occurred on July 6 and 7.

The move (which connected with Sonnen's face) led to a tense moment, when the two had to be separated by UFC president Dana White.

[12] The event consisted of 11 mixed-martial-arts bouts sanctioned by the Nevada State Athletic Commission and contested under the Unified Rules of Mixed Martial Arts.

[19] After taking down Izquierdo early in the first round, Oliveira was hit by a strong knee in the following stanza, but put his opponent in the ground again.

[19] In the second bout, Shane Roller rebounded from three losses in a row with a unanimous decision victory over John Alessio.

[19] In an uneventful bout, which saw only one successful takedown scored by Tibau despite a combined 19 attempts, [22] Nurmagomedov won 30–27, 30–27 and 30–27 on all three of the judges scorecards.

[23] In the preliminary card's final match, Melvin Guillard faced Brazilian Jiu-Jitsu black belt Fabrício Camões.

McKenzie collapsed to his knees and Mendes attacked him with ground-and-pound, forcing the referee to stop the contest at thirty-one seconds.

[24] In his first fight as a welterweight, former UFC Middleweight title challenger Demian Maia faced Judo black belt Dong Hyun Kim.

The bout was stopped in forty-seven seconds by referee Mario Yamasaki, after Maia took Kim down and finished him with strikes from the mounted position.

[19] UFC commentator Joe Rogan said that Kim had broken a rib, but it was later revealed that he suffered a major muscle spasm.

[27] Le won a hard-fought unanimous decision by exercising great footwork, trips and takedowns and effective striking.

[21] The sixth and final bout of the main card was the UFC Middleweight Championship match between Anderson SIlva and Chael Sonnen, regulated by referee Yves Lavigne.

In that match, Silva (after losing four rounds on points) made Sonnen submit to a triangle choke with 1:50 left in the fight.

Sonnen is also undefeated since UFC 117, defeating Brian Stann and Michael Bisping and setting the stage for the most-anticipated rematch of the year.

Due to a scheduling conflict with the United Nations Conference on Sustainable Development, the bout was moved to headline UFC 148 at the MGM Grand Garden Arena in Las Vegas, Nevada.

[42] As the fight finally took place, Sonnen quickly took the champion down in the first round and maintained a dominant position throughout, eventually gaining full mount while attacking with ground-and-pound.

[24] However, Sonnen was unable to inflict substantial damage to the champion, and as the fight resumed Silva was repeatedly admonished by the ref for holding Chael's shorts.