Operation Jubilee or the Dieppe Raid was an Allied amphibious attack on the German-occupied port of Dieppe in northern France, during the Second World War. Over 6,050 infantry, predominantly Canadian, supported by a regiment of tanks, were put ashore from a naval force operating under protection of Royal Air Force fighters.
The port was to be captured and held for a short period, to test the feasibility of a landing and to gather intelligence. German coastal defences, port structures and important buildings were to be demolished. The raid was intended to boost Allied morale, demonstrate the commitment of the United Kingdom to re-open the Western Front and support the Soviet Union, fighting on the Eastern Front.
Aerial and naval support was insufficient to enable the ground forces to achieve their objectives; the tanks were trapped on the beach and the infantry was largely prevented from entering the town by obstacles and German fire. After less than six hours, mounting casualties forced a retreat. The operation was a fiasco in which only one landing force achieved its objective and some intelligence including electronic intelligence was gathered.