Editor’s Introduction: The ill-fated action at Dieppe in August 1942 is most often remembered for the heavy casualties suffered by the Canadian land forces deployed in the assault and the political controversy that followed this ’military debacle.’ Lingering doubts over the rationale for the raid, and persistent statements that lives were lost in vain, continue to this day. But the Dieppe Raid was much more than casualties and questionable military decision making. It had immediate and valuable implications on the planning and conduct of future Allied amphibious operations, particularly the D-Day landings on 6 June 1944.
Leigh-Mallory, Trafford "Air Operations at Dieppe: An After-Action Report." Canadian Military History 12, 4 (2003)