As the Allied forces advanced through France following the Normandy landings, just behind the frontline the US Military Rail Service and their counterparts in the Royal Engineers were at work, ensuring that crucial supply lines were up and running - without them the liberation of France and the invasion of Germany would founder. Based on original research, 'The Liberation Line' reveals how the railwaymen overcame enemy attacks, sabotage and booby traps to repair many hundreds of miles of destroyed railway tracks and dozens of bridges and tunnels in order to deliver victory.