This historic docu series sheds new light on four famous campaigns of World War 2 – the Battle of England, Barbarossa, Operation Overlord and the Liberation of France – analysed through a unique prism: the train. Blending witness testimony and compelling international archive with new graphics, 3D imagery and detailed mapping, Trains at War examines the role trains and rail networks played by retracing complex historical situations and breaking down their importance to military strategy.