It flew the RCAF's first bombing operation ten weeks later on 12/13 June, attacking the railway marshalling yards at Schwerte.

It converted to the Handley Page Halifax in April 1942, taking part in the historic 1,000-bomber raid on Cologne on the night of 30/31 May 1942.

[2] In late October 1942, the squadron was loaned to Coastal Command to fly anti-submarine patrols in the Bay of Biscay at the time of the North African landings.

[4] Though 405 Squadron's primary combat functions are anti-submarine (ASW) and anti-surface warfare (ASUW), most of its time is spent fulfilling a variety of non-combat roles.

These include search and rescue, counter-drug operations with the RCMP, and anti-pollution and fisheries patrols.