The Western had been a part of the Big '10' until 1956, when the Eastern and Western conference were split into separate leagues—the Eastern becoming the Central, the Western becoming the Western League. In 1968, the St. Thomas Barons, Sarnia Legionnaires, Guelph Imperials, Chatham Maroons and Brantford Foresters broke away from the
Ontario Hockey Association to form a Junior "A" League known as the
Western Ontario Junior A Hockey League. A year later, the OHA pulled together a bunch of local teams (the Waterloo Siskins, Stratford Warriors, Sarnia Bees, St.Marys Lincolns and the London Squires) as well as the return of the Strathroy Rockets (who had joined the Central Junior B league for a season) and formed a new Western Ontario Junior "B" Hockey League. According to the WOJHL history, a re-organization of Ontario's Jr. B hockey teams occurred prior to the 1978/79 with the folding of the short lived
Southwestern Junior B Hockey League and the
Mid-Ontario Junior B Hockey League. The realignment meant that the OHA had consolidated the
Southern Ontario region from 7 to 5 Junior "B" leagues. Although this marks the birth of the modern Western Ontario Jr. B league, the teams in the league did not change. In 1989, the
Metro league went renegade and eventually became a Tier II Junior "A" league. In 1993, the
Central league was promoted to Tier II Junior "A" as well. Since then, the OHA has operated with 3 Junior "B" leagues, but due to the talent level of these 3 league there has been a recent push to bring all three leagues to the Tier II Junior "A" level and allow for a new realignment. From 1999 until 2001, the league changed its name to the Greater Ontario Hockey League in an attempt to drop the "Junior B" designation . The league has since referred to itself as the Western Ontario Hockey League. In 2007, the WOHL merged with the
Mid-Western Junior Hockey League and the
Golden Horseshoe Junior Hockey League to become the
Greater Ontario Junior Hockey League. ==Final teams==