There was also the New Orleans based “No Limit” group, founded under Master P, with Silkk the Shocker, Mystikal and for a period, Snoop Dogg (after Suge Knight went to prison), though it went defunct and was quasi-resurrected but isn’t what it once was.
Nelly came out of St. Louis, and founded Derrty Entertainment, but he remains the only big name in that crew. Da Brat and her So So Def were Chicago-based, but low-key.
As for the East Coast-West Coast beef, it started out of pure basic jealousy. As mentioned, NYC owned rap, the origins of hip-hop as we know it were in NYC, but as the 80s closed and 90s opened, West Coast MCs were getting attention with their very different, more hardcore style of rap, notably from NWA (the group that gave us Dr. Dre and Eazy E) from Compton.
In late 1991, a New York MC named Tim Dog released a diss track called “Fck Compton." A West Coast rapper named Tweety Bird (note that thus far no major artists were involved) released an answering diss called "Fck the South Bronx.” From there it was battle on.
1992 and 1993 belonged almost entirely to Dr. Dre and Snoop Dogg after “The Chronic” and “Doggystyle.” Suge Knight’s Death Row crew were the primary focus of attention.
Meanwhile in NYC in 1993, Sean Combs (Puff Daddy back then, you know his myriad nicknames) founded Bad Boy Records, with Notorious BIG and Craig Mack as his main artists. Biggie started blowing up as 93 closed.
But things just sort of simmered along with bad blood and basic “I’m better than you, I deserve more attention” sniping and taunting until November of 1994, when Tupac (who wasn’t in the Death Row crew but was West Coast) was ambushed in the lobby of a recording studio in NYC, robbed and shot five times. Shortly thereafter, Biggie put out a diss track called “Who Shot Ya?” – released while Shakur was still recovering. Shakur decided that the wording of the taunts in the track were evidence that someone in the Bad Boy crew (or the crew, in general) was responsible for the attempted murder.
After that, things took another turn because of ugliness at the 1995 Source Awards, which were in New York City, Suge Knight called out Combs from the stage over Combs’s habit of featuring on all the major releases from Bad Boy artists and showing up in the music videos. Combs was actually gracious in return, praising the Death Row crew and trying to diffuse tensions, but the crowd was pure East Coast, and when Dre and Snoop performed, the crowd was cold and Snoop was not too kind, and now the fans were in it.
After that there was another shooting of another Death Row affiliated person, and Knight again implicated Bad Boy. Tupac joined Death Row and the fire got hotter, centered around Tupac, who really couldn’t find any East Coast artists, especially Bad Boy artists, he couldn’t diss.
Eventually the nastiness boiled down to a the most personal and ugly allegation – first publicized by Jay-Z, who wasn’t Bad Boy crew but was based out of Brooklyn – that Biggie’s wife, Faith Evans, had cheated on Biggie with Tupac.
When Tupac was murdered in Vegas later that year, Suge Knight continued to lay blame at the door of Bad Boy and Combs – despite the fact that shortly before the shooting, Tupac, Knight and their crew beatdown a known member of the Crips gang, and when the shooting occurred they were headed toward a known Bloods-controlled nightclub.
Then Biggie went to LA for an event, and we know what happened next.