Timeline:
September 20, 1997: DeGeneration X is formed with Shawn Michaels, Hunter Hearst Helmsley, and Chyna at the WWF's UK PPV, "One Night Only."
November 9, 1997: Shawn Michaels defeated Bret Hart to win the WWF World Heavyweight Title in Montreal, Quebec, Canada.
March 30, 1998: With Shawn Michaels out with a back injury, Hunter Hearst Helmsley names himself leader and adds New Age Outlaws (Jesse James and Billy Gunn) and X-Pac to the group.
April 6, 1998: DX goes to "war" with WCW when they "invaded" the Scope in Norfolk, Virginia, where WCW Monday NITRO was taken place.
May 11, 1998: DX then "invades" WCW Headquarters at CNN One Center in Atlanta, Georgia.
May 25, 1998: Hunter Hearst Helmsley "flies" over an arena where WCW Monday NITRO is taken place and skywrites "WCW Sucks" and "DX Says Suck It."
July 27, 1998: Hunter Hearst Helmsley and X-Pac face off for the first time during a triple threat match for the Intercontinental Title against The Rock on RAW.
November 23, 1998: Shawn Michaels turned against DX by nailing X-Pac with the "Sweet Chin Music" and joins Vince McMahon's Corporation.
January 4, 1999: Michaels turns against the Corporation and rejoins DX. Michaels gets laid out by the Corporation and is out indefinitely.
Janury 25, 1999: Chyna turns against X-Pac and joins Vince McMahon's Corporation.
March 28, 1999: Hunter Hearst Helmsley turns against X-Pac at WrestleMania 15 and joins Vince McMahon's Corporation.
May 2, 1999: Billy Gunn turns against X-Pac during a tag team match and goes solo.
June 28, 1999: Hunter Hearst Helmsley tells Billy Gunn that Jesse James and X-Pac are getting royalties from the DX name.
July 25, 1999: X-Pac and Jesse James defeated Hunter Hearst Helmsley and Billy Gunn for the rights of DX.
September 23, 1999: Jesse James and Billy Gunn reform the New Age Outlaws and win the WWF World Tag Team Titles from The Rock and Mankind.
October 25, 1999: Hunter Hearst Helmsley and X-Pac help the New Age Outlaws to defeat The Rock and Steve Austin and DeGeneration X is reformed.
November 1999 - August 2000: Hunter Hearst Helmsley left DX when he "married" Stephanie McMahon, Billy Gunn was kicked out of the group, and Road Dogg and X-Pac teamed for awhile before they were split up.
July 22, 2002: Triple H and Shawn Michaels reunited to create DX to make Raw General Manager Eric Bischoff's life a living hell, but a few minutes after reuniting HHH pedigreed HBK to once again kill DX.
2006 – After feuding since 2002, Triple H and Shawn Michaels put their differences aside due to their mutual hatred of the McMahon family, and reformed the new D-X.
[Edited by king-of-games, 11/25/2006 8:55:55 PM]