No. 420 Squadron was formed at Waddington, Lincolnshire, England on 19 December 1941 as the RCAF's 18th (and fourth Bomber) squadron formed overseas.
The Sabre Squadron | No. 33 Squadron RAF | No. 263 Squadron RAF | squadron | Pacific Squadron | No. 45 Squadron RAF | No. 127 Squadron RAF | No. 617 Squadron RAF | No. 43 Squadron RAF | No. 38 Squadron RAF | No. 107 Squadron RAF | German East Asia Squadron | Far East Squadron | Squadron (aviation) | No. 77 Squadron RAAF | No. 71 Squadron RAF | No. 49 Squadron RAF | No. 48 Squadron RAF | No. 2 Squadron RAF | No. 233 Squadron RAF | No. 133 Squadron RAF | Jin Dynasty (265-420) | Chachi 420 | Asiatic Squadron | 44th Fighter Squadron | 24th Tactical Air Support Squadron | 160th Fighter Squadron | Volunteer Gliding Squadron | Squadron Sinister | RCAF Station Mount Pleasant |
Squadrons based here include: 76 Squadron, which flew Halifaxes, 78 Squadron, which flew Whitleys, 419 Squadron RCAF, which flew Wellingtons, Halifaxes, and Lancasters, 420 Squadron RCAF, which flew Wellingtons, and 428 Squadron RCAF, which flew Wellingtons, Halifaxes, and Lancasters.