The 1918–19 NHL season was the second season of the National Hockey League (NHL). While at first it was uncertain that the NHL would operate, and the possibility that National Hockey Association (NHA) would be resumed, the unfinished business of Eddie Livingstone's Toronto and Ottawa's NHA franchise, led to the NHL owners suspending the NHA again. Livingstone would attempt to overthrow the NHA management, and failing that, attempt to operate a rival league. The pre-season was filled with legal actions, deceptions and public verbal attacks. Ultimately, the NHL operated with three teams, in Montreal, Ottawa and Toronto. However, the season ended early with Toronto suspending operations, leaving Montreal and Ottawa to play off for the championship. Montreal would win the playoff and travel to Seattle for the Stanley Cup Finals. However, the championship series was not completed due to influenza infecting the whole Montreal team and causing the eventual death of Montreal's Joe Hall.

League business

The pre-season saw plenty of action off the ice. Toronto NHA owner Eddie Livingstone had found a partner in Percy Quinn, manager of the Toronto Arena Gardens, to take on the NHA/NHL owners. The two together tried to lease the ice time at the Toronto Arena Gardens, Ottawa Arena and Montreal Jubilee Rink from under the noses of the NHL owners, launched several lawsuits, attempted to launch a competing league and attempted to relaunch the NHA, but ultimately were unsuccessful. The NHA, while not operating, met three times.

1918–19 NHL season

Purchase of Quebec Bulldogs

The first action of Livingstone and Quinn was Quinn's attempt to purchase the Quebec Bulldogs, putting down a $600 down payment. At the time, Quinn's purchase was welcomed by the other NHA owners, thinking that they would gain an operating franchise. Quinn's action gave Quinn and Livingstone three votes at NHA meetings. Livingstone still had the voting shares of the Ontarios and Torontos NHA franchises.

1918–19 NHL season

Second suspension of NHA

On September 27, 1918, in Montreal, the NHA directors met again. Ottawa, Montreal Wanderers and Canadiens voted to again suspend operations of the league. This meant that the NHL would operate for a second season. Percy Quinn's purchase of the Quebec Bulldogs was approved but his franchise could not play. The action of the NHA directors led to Livingstone filing a lawsuit on October 1, 1918, charging that there was a conspiracy among the NHA owners, paid for by the Arena Company to suspend the NHA operations and asking the court to nullify the suspension.

1918–19 NHL season

On October 2, Quinn would meet with Ted Dey, owner of the Ottawa Arena and enter into an agreement to lease the Ottawa Arena. Dey accepted a check from Quinn, but did not cash it. He had plans of his own, involving the takeover of the Ottawa Senators, making it look to the Senators' management that they had no arena to play in. Rather than let the team fold, Martin Rosenthal entered into an agreement to sell the Senators to Dey.

Lawsuit against Arena Company

Since Toronto had won the Cup in 1917–18, a monkey wrench had been thrown into the other owners' scheme to get rid of Livingstone. His team was estimated now to be worth $20,000, and Livingstone demanded that. The Arena Company offered $7,000, but Livingstone instead sued the Arena and Charlie Querrie for $20,000. In the days following the filing of the lawsuit against Arena, Hubert Vearncombe, treasurer of the Toronto Arena Company, formed the separate Toronto Arena HC. This separated the hockey club from the Livingstone lawsuits, though the franchise still used Livingstone's players without permission.