Mulberry harbours were temporary portable harbours developed by the United Kingdom during the Second World War to facilitate the rapid offloading of cargo onto beaches during the Allied invasion of Normandy in June 1944.

OMAHA BEACH, NORMANDY, FRANCE - 1944: Mulberry harbours were temporary portable harbours developed by the United Kingdom during the Second World War to facilitate the rapid offloading of cargo onto beaches during the Allied invasion of Normandy in June 1944.