The National Hockey Association (NHA), officially the National Hockey Association of Canada Limited, was a professional ice hockey organization with teams in Ontario and Quebec, Canada. It is the direct predecessor to today's National Hockey League (NHL). Founded in 1909 by Ambrose O'Brien, the NHA introduced 'six-man hockey' by removing the 'rover' position in 1911. During its lifetime, the league coped with competition for players with the rival Pacific Coast Hockey Association (PCHA), the enlistment of players for World War I and disagreements between owners. The disagreements between owners came to a head in 1917, when the NHA suspended operations in order to get rid of an unwanted owner (Eddie Livingstone). The remaining NHA team owners started the NHL in parallel as a temporary measure, to continue play while negotiations went on with Livingstone and other lawsuits were pending. A year later, after no progress was reached with Livingstone, the other NHA owners decided to permanently suspend the NHA. The NHA's rules, constitution and trophies were continued in the NHL.