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. 421 Squadron RCAF
Having been disbanded shortly after the war the squadron was re-activated on 15 September 1949 at Chatham flying Vampire aircraft from bases in the UK and later flying Canadair Sabres from Grostenquin, France. In 1962 it was equipped with CF-104 Starfighters and in 1967 the squadron moved to Zweibrücken becoming part of 1 Air Division RCAF (later renamed 1 Canadian Air Group) based at CFB Baden-Soellingen, West Germany. During the early 1980s it was equipped with CF-18 Hornets. At the end of the Cold War the squadron was disbanded and its aircraft and personnel returned to Canada.