May 4/5, 1943

    32 Halifaxes from 408 and 419 Squadrons were joined by 47 Wellingtons from 426, 428, 429, and 431 Squadrons on an attack at Dortmund. The crews were over the target at between 12,000 and 21,000 feet, releasing 126,000 lbs of high explosives and 183,000 lbs of incendiaries. According to reports, bombing was accurate and severe damage was caused including 2 steel factories and the dock area.

    Sgt G. Johnston from 408 Squadron returned early, as the rear turret was jammed.
    F/Sgt G. Johannesson RCAF and crew, flying Halifax II   HR-658 coded EQ-V, failed to return from this operation.

      Sgt C. Ellard RCAF
      F/O W. Grant RCAF
      F/Sgt M. Metcalfe RCAF
      W/O2 D. Nault RCAF
      W/O2 R. Clitheroe RCAF
      Sgt J. Archer RCAF
    All were lost without a trace.

    P/O R. Blackhall RCAF and crew, flying Halifax II   JB-898 coded EQ-Q, failed to return from this operation.

      P/O F. Scythes RAF–POW
      Sgt K. Emmons RCAF
      F/Sgt C. Norton RAF–POW
      Sgt G. Semper RAF–POW
      F/Sgt K. Godfrey RAF–POW
      P/O A. Sutton RCAF
      Sgt C. Horn RCAF–POW
    3 crew killed and 5 POWs after being shot down by a Nightfighter.

    Sgt P. Johnson from 419 Squadron was hit by flak, not serious.
    Sgt J.McIntosh returned early as they were hit by flak, the stbd rudder and fuselage was damaged.
    F/O C. Vaillancourt RCAF–POW and crew, flying Halifax II   W-7817 coded VR-A, failed to return from this operation.

      Sgt A. Jaynes RCAF–POW
      P/O D. Grimshaw RAF–POW
      Sgt N. Douglas RAF–POW
      Sgt A. Morrison RCAF–POW
      Sgt J. Peck RCAF–POW
      Sgt F. Stanley RCAF
    6 crew were POWs and 1 killed when shot down by a Nightfighter.

    F/O W. Elliott RCAF and crew, flying Halifax II   DT-794 coded VR-V, failed to return from this operation.

      Sgt G. Menzies RCAF
      F/O E. Kennedy RCAF
      F/O H. Medcalfe RCAF
      Sgt G. Sandfield RAF
      F/Sgt J. McIntosh RCAF
      Sgt J. Farrel RCAF
    All were killed.

    F/O R. Epps from 426 Squadron returned early as the port engine was u/s. They landed safely at base on 3 engines.
    Sgt L. Sutherland returned early as the intercom was u/s.

    F/Sgt H. Read from 428 Squadron returned early as the navigation aids were u/s.
    Sgt J. Ferguson returned early as their Wellington would not climb.
    Sgt R. Kelly returned early as the port engine was overheating.
    P/O V. Sylvester was attacked by an ME-110, there was no claim or damage.
    W/O1 R. Moulton RCAF and crew, flying Wellington X   HE-727 coded NA-K, failed to return from this operation.

      Sgt G. Carter RCAF–POW
      F/Sgt J. White RCAF
      Sgt H. Hoddinott RAF–POW
      F/Sgt J. Thibaudeau RCAF
    3 crew killed and 2 were POWs.

    F/Sgt D. Johnson RCAF and crew, flying Wellington X   HE-864 coded NA-D, failed to return from this operation.

      Sgt J. Boyd RCAF–POW
      F/Sgt J. Prosnyck RCAF
      Sgt D. Thomson RCAF–POW
      Sgt J. Levasseur RCAF–POW
    3 were POWs and 2 killed after being shot down by a Nightfighter.

    P/O B. Geale from 429 Squadron returned early as one engine was u/s. 
    Sgt J. Pendleton and crew flying Wellington X HE-589 coded AL-V were attacked by a ME-109, there was no claim or damage.

    Sgt A. Bryant and F/Sgt. R. Hamby from 431 squadron returned early as they were unable to climb.
    Sgt J. Esdale and Sgt. P. Davis landed at Riccall on return.
    F/O H. Wilkinson and Sgt. A. Smith landed at Lissett on return.
    Sgt J. Morton landed at Driffield on return.
    Sgt K. Smith landed at Elvington on return.