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
British logistics in the Normandy Campaign the purpose. During the first seven weeks after the British and Canadian landings in Normandy on D-Day, 6 June 1944, the advance was much slower than anticipated, and the lodgement area much smaller. The short lines of communication provided an opportunity to build up reserves of supplies. Two army roadheads were created, No. 1 Army Roadhead for I Corps and No. 2 Army Roadhead for XXX Corps. When the Canadian First Army assumed control of the British I Corps on 21 June, No. 1 Army Roadhead also passed to its control. No. 2 Army Roadhead formed the nucleus of what