The Australian Hockey League (AHL) was Australia's premier national domestic field hockey competition. Despite its non-professional nature, AHL is considered one of the strongest and most competitive national hockey leagues in the world. The AHL consists of both men's and women's competition. It includes many players from the Kookaburras and the Hockeyroos, and participating in the AHL is a selection requirement for all Australian national squad members. The last edition of the AHL was contested in 2018. The league was replaced by Hockey One, Australia's new elite domestic hockey competition. History The first season of the Australian Men's National Hockey League (former AHL) took place in 1991, when the perpetual national championship was replaced by a new-look format. The competition, which was played over a two-month period, did not limit player eligibility to state of origin. Six teams competed in the first year – Brisbane Blades, Melbourne Redbacks, Adelaide Hotshots, Canberra Lakers, Sydney Stingrays and Tamworth Frogs. In 1991 and 1992, both the National Championship and the National Hockey League was played, placing a financial burden on the states. From 1993, the decision was made to play the National Hockey League as the sole competition in determining Australia's champion State. The league has since evolved into an eight team competition played on a home and away basis before climaxing with a finals series. In 2000, 2004 and 2008 however, the league reverted to a two-week championship format. This format is designed to replicate the intense nature and heavy playing schedule of the Olympic Games. The league embraced some big changes leading into the 2001 season as the former Men's and Women's National Hockey League combined to form the Australian Hockey League (AHL). Both the men's and women's leagues shifted their seasons from mid-year to February–April and a unique format was adopted. The format devised allows a high level of hockey to be seen across Australia through four weeks of home-and-away competition. The league then climaxes with a full finals week that comprises three-round matches, the semi-finals and finals. Competition Format and Rules Past Editions Prior to 2018, the Australian Hockey League was run as a centralised tournament. Teams were split into two pools, Pool A and Pool B, playing in a single round robin format. At the conclusion of the pool stage, the top two teams entered the medal round, while the remaining teams played in the classification round. 2018