Vietnam during the Vietnam War. It is commonly used by both the Australian people and the governing body, the FFA. The nickname represents a cultural propensity for the use of colloquialisms in the country. It also represents the Australian English use of the sport's name. The name itself is similar to most other Australian national representative sporting team nicknames; used informally when referring to the team, in the media or in conversation. Similarly, the name is derived from a well-known symbol of Australia, in this case, the kangaroo. The words soccer and kangaroo are combined into a portmanteau word as soccer-roo; such as Olyroos for the Australia Olympic soccer team or Hockeyroos for the Australian national women's hockey team. Rivalries Australia's longtime rivals are trans-Tasman neighbours New Zealand. The two teams' history dates back to 1922, where they first met in both their international debuts. The rivalry between the Socceroos and the All Whites (New Zealand) is part of a wider friendly rivalry between the neighbours Australia and New Zealand, which applies not only to sport but to the culture of the two countries. The rivalry was intensified when Australia and New Zealand were both members of the OFC, regularly competing in OFC Nations Cup finals and in FIFA World Cup qualifications, where only one team from the OFC progressed to the World Cup. Since Australia left the OFC to join the AFC in 2006, competition between the two teams has been less frequent. However, the rivalry between the two teams is still strong, with the occasional match receiving much media and public attention. After joining the AFC, Australia began to develop a fierce rivalry with fellow Asian powerhouse Japan. The rivalry began at the 2006 World Cup, where the two countries were grouped together. The rivalry continued with the two countries meeting regularly in various AFC competitions, including the 2011 Asian Cup final and qualification for the 2010, 2014, 2018 and 2022 World Cups. Another major rival within Asia is South Korea, who Australia came up against in three World Cup qualification campaigns in the 1970s and, since joining the AFC, have met regularly including the victory by Australia in the 2015 Asian Cup final. Supporters The main supporter group of the Australian national team is Socceroos Active Support (SAS). SAS was founded in January 2015 as an independent group, who uses social media to organise and keep in