The AFC Asian Cup is the primary association football competition contested by the senior men's national teams of the members of the Asian Football Confederation (AFC), determining the continental champion of Asia. It is the second oldest continental football championship in the world after Copa América. The winning team becomes the champion of Asia and until 2015 qualified for the FIFA Confederations Cup. The Asian Cup was held once every four years from the 1956 edition in Hong Kong until the 2004 tournament in China. However, since the Summer Olympic Games and the European Football Championship were also scheduled in the same year as the Asian Cup, the AFC decided to move their championship to a less crowded cycle. After 2004, the tournament was next held in 2007, when it was co-hosted by four countries in Southeast Asia: Indonesia, Malaysia, Thailand and Vietnam. Thereafter, it has been held every four years. The Asian Cup has generally been dominated by a small number of top teams. Initially successful teams included South Korea (twice) and Iran (three times). Since 1984, Japan (four times) and Saudi Arabia (three times) have been the most successful teams, together winning seven of the last ten finals. The other teams which have achieved success are Qatar (2019 current champions), Australia (2015), Iraq (2007) and Kuwait (1980). Israel won in 1964 but was later expelled and has since joined UEFA. Australia joined the Asian confederation in 2007 and hosted the Asian Cup finals in 2015, winning the competition in the final against South Korea. The 2019 tournament was expanded from 16 teams to 24 teams, with the qualifying process doubling as part of the qualification for the 2018 FIFA World Cup. History Beginning A pan-Asian competition was first proposed after the end of World War II, but it was not implemented until the 1950s. Two years after the Asian Football Confederation (AFC) came into being in 1954, the first ever AFC Asian Cup was staged in Hong Kong with seven of the twelve founding members taking part, making the tournament the second oldest in the world. The qualifying process involved the hosts plus the winners of the various zones (Central, Eastern and Western). It was only a four-team tournament, a format that also existed for 1960 and 1964. Each sub-confederation already hosts their own biennial championship, each with varying degrees of interest. South Korea demonstrated its superiority in