The Dieppe Raid was an Allied assault on the German-occupied port of Dieppe, France on 19 August 1942, during the Second World War. The main assault lasted less than six hours until strong German defenses and mounting Allied losses forced its commanders to call a retreat.
Over 6,000 infantrymen, predominantly Canadian, were supported by The Calgary Regiment of the 1st Canadian Tank Brigade and a strong force of Royal Navy and smaller Royal Air Force landing contingents. It involved 5,000 Canadians, 1,000 British troops, and 50 United States Army Rangers.