This is the first volume in a three-volume illustrated history of the evolution of armoured manoeuvre warfare in the British army, covering the period from 1914 until 1939\\. Author Dick Taylor's tour de force covers the evolution of the tank and armoured cars in response to the specific conditions created by trench warfare, the history of the use of tanks during the war, as well as the critical period between the wars in which the tank was both refined and neglected. He also looks in detail at the amalgamations and mechanization of the horsed cavalry which led to the formation of the Royal Armoured Corps in 1939. His detailed and absorbing narrative covers the social and human aspects of the story as well as the technology, and explains how the nation that invented and first fielded the tank in 1916 struggled to maintain the lead after the Armistice.