The Ottawa Senators, also known as the Ottawa Commandos and Senior Senators, was an amateur, later semi-professional, senior-level men's ice hockey team based in Ottawa, Ontario, Canada. In 1934, the Ottawa Auditorium, owners of the Ottawa Hockey Association decided it could no longer operate the Senators of the National Hockey League in Ottawa due to mounting financial losses. The Association split its hockey operations, relocating the NHL franchise to St. Louis, and continuing the Senators as an amateur club. The club operated from 1934 until 1955, winning the Allan Cup Canadian men's senior ice hockey championship in 1943, 1948 and 1949. During the war years from 1942 until 1944, it operated as the Ottawa Commandos.