Dieppe Raid

The Dieppe Raid was a failed Allied amphibious assault on the German-occupied port of Dieppe, France, on August 19, 1942. Heavy losses exposed the difficulty of attacking a defended port and informed later Allied amphibious operations.

Operation Jubilee: The Allied codename for the 1942 assault on Dieppe. The operation’s objectives and sequence shaped the raid’s exposed landings and withdrawal.
Normandy landings: The Allied invasion of German-occupied Normandy on June 6, 1944. Lessons from Dieppe influenced the planning and tactics used for the later invasion of France.
Lord Louis Mountbatten: A British naval officer who led Combined Operations during World War II. He oversaw Combined Operations when it organized the Dieppe assault.
Puys: A village and beach sector east of Dieppe, attacked during the 1942 raid. The assault at Puys was pinned down by steep terrain and German fire.
Combined Operations Headquarters: The British organization responsible for planning and conducting amphibious raids during World War II. It coordinated the British-led planning and preparation for the attack.
Mulberry harbours: Portable artificial harbours built by the Allies to support the Normandy invasion. Their use addressed the danger of relying on captured ports, highlighted at Dieppe.
John Hamilton Roberts: A Canadian major general who commanded the military forces assigned to the Dieppe Raid. His command decisions became central to accounts of the Canadian-led assault.
Pourville: A coastal village west of Dieppe where Allied troops landed during the raid. The landing there achieved a limited advance before German resistance stopped it.
Amphibious warfare: Military operations that combine naval and land forces to project troops from sea onto shore. The raid tested an amphibious assault against a fortified, occupied coastline.
Operation Torch: The Allied invasion of French North Africa in November 1942. Its planners weighed the danger of assaulting defended ports after the Dieppe experience.

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William Lyon Mackenzie KingRelated: The raid intensified debate about Canada’s wartime sacrifices under King’s government.