Relive the battle between UFC and Pride.

The biggest upsets in UFC history.

Five of Anderson Silva's early fights in the UFC that launched his legendary reign over the middleweight division.

The epic light heavyweight title trilogy between two of the UFC's biggest stars -- Chuck Liddell and Randy Couture.

Big men score big wins in four heavyweight fights from the UFC vaults. With Tim Sylvia vs. Andrei Arlovski, Pedro Rizzo vs. Josh Barnett, Ian Freeman vs. Frank Mir and Bas Rutten vs. Tsuyoshi Kosaka.

A look back at some classic brawls in UFC history.

Four defining fights from Hall of Famer and longtime welterweight champion Matt Hughes.

A look at four fights from the impressive career of math teacher-turned-UFC champion Rich Franklin.

Seven fights from the extraordinary career of UFC heavyweight Frank Mir, including bouts against Brock Lesnar, Minotauro Nogueira and Tim Sylvia.

Three memorable bouts: Rashad Evans vs. Lyoto Machida for the light heavyweight championship; Pat Miletich vs. Carlos Newton for the welterweight title; and a lightweight bout between Terry Etim and Justin Buchholz.

Pro wrestling superstar Brock Lesnar takes his skills to the UFC, rapidly becoming the promotion's heavyweight champion; a look at all of his Octagon wins through UFC 100, including title fights against Randy Couture and Frank Mir.

A look at UFC fighter BJ Penn.

Classic heavyweight action from the UFC.

Unbeatens Rashad Evans and Lyoto Machida brawl.