"Engines Of War" spans more than a century and takes in all the engagements in which railways have played a part, including the Crimean War, the American Civil War, both World Wars, the Korean War, and the Cold War - with its mysterious missile trains. It shows how the "iron road" not only made armies far more mobile, but also greatly increased the scale and power of available weaponry. In doing so, wars were fought across wider fronts and over longer timescales, with far deadlier consequences.