The 2005 Guerra del Golfo (Spanish for "Gulf War") was the first instance of the recurring IWRG Guerra del Golfo major event produced and scripted by the Mexican professional wrestling promotion International Wrestling Revolution Group ("IWRG"; sometimes referred to as Grupo Internacional Revolución in Mexico). The show, held on December 22, 2005 also commemorated the 29th Anniversary of Arena Naucalpan, IWRG's main venue. In this instance the "Gulf" referred to in the title is the Gulf of Mexico, not the Gulf War in the Persian Gulf.

The annual Guerra del Golfo main event consists of three matches in total, with two "qualifying matches", multi-man steel cage matches where the last person left in the cage advances to the main event of the night. The two losers would then be forced to wrestle inside the steel cage, with the loser of that match being forced to either take off their wrestling mask or have their hair shaved off under Lucha de Apuestas, or "bet match" rules, if they are unmasked. In the main event masked wrestler Nemesis defeated Ultra Mega, forcing him to unmask as a result. The undercard also saw Scorpio Jr. defeat Heavy Metal to win the IWRG Intercontinental Heavyweight Championship for the third time.

Starting as far back as 1997, the Mexican wrestling promotion International Wrestling Revolution Group (IWRG; sometimes referred to as Grupo Internacional Revolución in Spanish) has held several annual events where the main event was a multi-man steel cage match where the last wrestler left in the cage would be forced to either remove their wrestling mask or have their hair shaved off under Lucha de Apuestas, or "bet match", rules. From 2005 IWRG has promoted a major show based on the steel cage match concept under the name Guerra del Golfo, or "Gulf War", referring to the Gulf of Mexico, not the Gulf War in the Persian Gulf. The Gurerra del Golfo shows featured two "qualifying" steel cage matches where the loser would later be forced to face off against each other in the main event of the show, a final cage match where the loser would be forced to either unmask or have his/her hair shaved off. The use of the steel cage in three matches distinguishes the Guerra del Golfo event from other steel cage matches held throughout the year such as the IWRG El Castillo del Terror ("The Tower of Terror"), IWRG Guerra de Sexos ("War of the Sexes") or IWRG Prison Fatal ("Deadly Prison") shows. The Guerra del Golfo shows, as well as the majority of the IWRG shows in general, are held in Arena Naucalpan, owned by the promoters of IWRG and their main arena.

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