The Dieppe Raid, also known as The Battle of Dieppe, Operation Rutter or later on Operation Jubilee, during the Second World War, was an Allied attack on the German-occupied port of Dieppe on the northern coast of France on 19 August 1942. The assault began at 5:00 AM and by 10:50 AM the Allied commanders had been forced to call a retreat. Over 6,000 infantrymen, predominantly Canadian, were supported by large Royal Navy and Royal Air Force contingents. The objective was to seize and hold a major port for a short period, both to prove it was possible and to gather intelligence from prisoners and captured materials while assessing the German responses. The Allies also wanted to destroy coastal defences, port structures and all strategic buildings.
No major objectives of the raid were accomplished. A total of 3,623 of the 6,086 men (almost 60%) who made it ashore were either killed, wounded, or captured. The air force failed to lure the Luftwaffe into open battle, losing 96 aircraft (at least 32 to Flak or accidents) compared to 48 lost by the Luftwaffe, while the Royal Navy lost 33 landing craft and one destroyer. The events at Dieppe later influenced preparations for the North African (Operation Torch) and Normandy Landings (Operation Overlord).