Mulberry was the code name given to the two artificial harbours designed by the Allies for the Normandy landings to compensate for the lack of deep-water ports. Mulberry A (for American) was set up off Omaha Beach and Mulberry B (for British) off Gold Beach. Both ports were protected externally by bombardons. They consisted of sea walls formed by lines of blockships and Phoenix caissons, and housed docks and floating roads connected to the beaches.