Book excerpt: This WWII history chronicles the remarkable engineering achievement that kept vital supplies flowing to Allied forces after D-Day. In the planning stages of the Normandy invasion, Allied strategists correctly anticipated that the Germans would deny, either by destruction or dogged defense, the vital Channel ports in the aftermath of D-Day. If the invading armies could not be kept resupplied, Operation Overlord would fail. The only solution was to design, build, transport and install two massive artificial harbors. Code Name Mulberry tells the story of this highly ambitious scheme from the initial planning stage to its successful execution on the field of battle. Told in clear, accessible prose, the historical narrative is amply supported with photographs, diagrams and tables, which vividly demonstrate the scale of this great venture.