Question: HMCS "Buctouche" was a Flower-class corvette that served in which organization, during the Second World War, she served primarily in the Battle of the Atlantic as a convoy escort?
Sentence (from "Battle of the Atlantic"): The Germans were joined by submarines of the Italian Royal Navy ("Regia Marina") after their Axis ally Italy entered the war on June 10, 1940.
Relevant evidence: No