Sean 'Diddy' Combs tried to ambush Suge Knight with guns, his ex Cassie Ventura said in court. What to know about the hip-hop heavyweights' feud.

Sean "Diddy" Combs and Marion "Suge" Knight have been rivals since the 1990s.

Richard Shotwell / Invision / AP / AP

• Sean "Diddy" Combs' former assistant testified that he tried to ambush Marion "Suge" Knight in 2008.
• Diddy and Suge have been feuding since the '90s, when they both launched hip-hop record labels.
• Here's what to know about their feud and how it relates to the deaths of Tupac Shakur and the Notorious B.I.G.

The sex-trafficking trial of Sean "Diddy"...