 The Mexican wrestling promotion International Wrestling Revolution Group (IWRG; Sometimes referred to as "Grupo Internacional Revolución" in Spanish) has a long-standing history of holding major event focused on 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.In 2005 IWRG created a specific spring-time show promoting 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 middle east).The "Guerra del Golfo" shows featured two "qualifying" multi-man steel cage matches where the loser would later be forced to face off against each other in the main event of the show.