In 1936, the regiment was disbanded as a result of a country wide reorganization of the Canadian Militia.

[1][2] First authorized on 29 August 1914 as the 55th Regiment in Montreal, Quebec.

[1] It recruited primarily from Montreal's Irish community where along with the rest of the local militia provided home defence in the Montreal area.

In the summer of 1915, the regiment would recruit an entire company for service with the newly raised 60th Battalion (Victoria Rifles of Canada), CEF.

Later that same year, the regiment was the prime recruiter for the newly raised 199th Battalion of the Canadian Expeditionary Force, of which most of the men recruited primarily came from the 55th Regiment.