Empire ship the Normandy invasion depended on the successful construction of the Mulberry ports. These were prefabricated ports, constructed at Southampton, Gosport, Portsmouth, Tilbury Docks, and even as far north as Birkenhead and Hartlepool. Two hundred tugs then took three months to tow the components of the harbours from where they were constructed to assembly areas on the South Coast. Between 7 June 1944 and the end of July, the tugs towed the materials across the channel to Normandy. Before D-Day, sixty old merchant ships and four old warships were selected as blockships, to be scuttled in a line to give protection
Scuttling of the French fleet at Toulon the French fleet would be largely disarmed and confined to its harbours, under French control. The Allies were concerned that the fleet, which included some of the most advanced warships of the time, might fall into enemy hands and so the British attacked the French Fleet at Mers-el-Kebir on 3 July 1940 and at the Battle of Dakar on 23 September 1940. On 8 November 1942 the Allies invaded French North Africa (Operation Torch). It may be that General Dwight Eisenhower, with the support of President of the United States Franklin D. Roosevelt and British Prime Minister Winston Churchill, made