No. 428 Squadron RCAF
No. 428 Squadron RCAF was the ninth long-range heavy bomber Article XV squadron formed overseas during the Second World War at RAF Dalton in Yorkshire, England on November 7, 1942. The squadron was initially assigned to No. 4 Group RAF. With the creation of No. 6 Group RCAF, the squadron was reallocated on January 1, 1943 operating with it until April 25, 1945.
No. 428 Squadron RCAF
The squadron was first equipped with Vickers Wellingtons (Mk III and Mk X), and its first operational mission was on January 26–27, 1943, when five Wellingtons bombed the Keroman Submarine Base U-Boat pens at Lorient in Brittany, on the Bay of Biscay. In the early part of June 1943, the squadron moved to RAF Middleton St. George where it remained for the remainder of the war. Around this time the squadron was converted to Handley Page Halifaxes (Mk Vs, and later supplemented by Mk II Series IIA).