Back in the mid-'90s, the WWE had a few backstage groups like "The Kliq" and "The Hart Foundation," but there also was a mysterious group called the "Bone Street Krew" founded by Yokozuna and headed by The Undertaker. In an interview with WWE.com, Shawn Michaels, JBL, The Godfather and other superstars revealed the history of the group.

"The Kliq" became one of the most prominent groups backstage in the WWE that was composed of real-life friends Shawn Michaels, Paul "Triple H" Levesque, Kevin Nash, Scott Hall and Sean "X-Pac" Waltman. They were known to be a group of guys that looked out for themselves and started the politics that took over the WWE backstage, per What Culture.

"The Hart Foundation" disbanded when Bret Hart went to WCW in 1997, but the "Bone Street Krew" was reportedly formed to counter "The Kliq." The Undertaker is the unquestioned leader of the group that also included Yokozuna, The Godfather, Savio Vega, Henry Godwinn, Mideon, Rikishi, Brian Adams, Paul Bearer and Mr. Fuji, as reported by Wrestling Inc.

Charles Wright, more known as The Godfather, revealed that they were just a group of guys that became friends who had things in common. The group was so tight that they got tattoos that said "BSK" on their bodies. The most prominent one was The Undertaker's "BSK Pride" ink on his abdomen.

"Much like 'The Kliq,' they were just guys that hung out with each other. At some point, after guys had stirred up the locker room about 'The Kliq,' all of those guys got 'BSK' tattoos," Michaels told WWE.com. The Heartbreak Kid was known for his bad attitude at the time and was rumored that he and The Undertaker were in bad terms.

"I hate to dispel the myths about all these groups that were warring back in the day, but they weren't warring back in the day. I was in the locker room with all these guys. The "BSK", to my knowledge, never had a problem with The Kliq. Really, nobody did," JBL answered.

"Everybody knows those two groups, but there's nothing wrong with either of them. They're different. 'The Kliq' is like the jocks against the garage band guys. It was white collar vs. blue collar," Mideon added.

Vega mentioned that they formed the group to represent the WWE backstage and its roster. It was because they cared for each other and didn't want to let the company look bad, especially with a lot of guys crossing the line during the Monday Night Wars with WCW. You can read the full interview by clicking here.