Armageddon (2004) was the fifth annual Armageddon professional wrestling pay-per-view event produced by World Wrestling Entertainment (WWE). It took place on December 12, 2004 at the Gwinnett Center in Atlanta, Georgia. Nine professional wrestling matches were scheduled on the event's card. The event featured wrestlers and other talent from WWE's SmackDown! brand. It was the fifth annual Armageddon event. Professional wrestling is a type of sports entertainment in which theatrical events are combined with a competitive sport. The buildup to the matches and the scenarios that took place before, during, and after the event were planned by WWE's script writers. The event starred wrestlers from the SmackDown brand: storyline expansions of the promotion where employees are assigned to wrestling brands under the WWE banner.
Three of the four championships exclusive to the SmackDown! brand were contested for; one was lost while the other two were retained. The main event was a Fatal-Four Way match for the WWE Championship involving champion John "Bradshaw" Layfield (JBL), Booker T, Eddie Guerrero and The Undertaker, which JBL won after pinning Booker. One of the predomiant matches on the undercard was The Big Show versus Kurt Angle, Mark Jindrak and Luther Reigns in a Handicap match. Big Show won the match after pinning Jindrak following an F-5. Another primary match on the card was John Cena versus Jess in a Street Fight for the WWE United States Championship, which Cena won by pinfall after executing an FU.