The Royal Canadian Navy (RCN) established a temporary training base in the Imperial fortress colony of Bermuda (also called the Somers Isles) during the latter part of World War II.

From 1944 to 1945, the RCN operated a shore facility named HMCS Somers Isles from the former Royal Navy base at Convict's Bay, St. George's (which had been transferred to the War Office to be joined to the adjacent St. George's Garrison after the Royal Navy had relocated to Bermuda's West End in the 19th Century).

The RCN returned to Bermuda, taking over part of the former RN property and creating a winter training installation.

The RCN also built a transmitter facility on Ireland Island North, using a former Royal Navy wireless station that operated between 1939 and 1949.

The end of the Cold War saw the Government of Canada announce the closure of all overseas Canadian Forces bases and stations; CFB Lahr and CFB Baden-Soellingen in West Germany and CFS Bermuda were slated for closure and repatriation of units and personnel to Canada.