The Dieppe Raid, also known as the Battle of Dieppe, Operation Rutter and, later, Operation Jubilee, was a Second World War Allied attack on the German-occupied port of Dieppe. The raid took place on the northern coast of France on 19 August 1942. The assault began at 5:00 a.m. and by 10:50 a.m. the Allied commanders were forced to call a retreat. Over 6,000 infantrymen, predominantly Canadian, were supported by a Canadian Armoured regiment 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 Rangers.
Objectives included seizing and holding a major port for a short period, both to prove that it was possible and to gather intelligence. Upon retreat, the Allies also wanted to destroy coastal defences, port structures and all strategic buildings. The raid had the added objectives of boosting morale and demonstrating the firm commitment of the United Kingdom to open a western front in Europe.
Virtually none of these objectives were met.