Based on John Keegan’s book The History of Warfare, a New York Times bestseller, this two-part series explores the connections between humankind’s quest for peaceful development and its urge towards conquest and destruction. REVOLUTION – By the 18th Century, the ambitions of Prussia precipitated the first world war. BLOOD AND IRON – Industrialisation had transformed warfare. The Prussians won another great victory and established a united Germany. WAR MACHINES – The technologies that failed to break the stalemate in the First World War – the tank and the plane – are a spectacular success at the start of WW II. THE PRICE OF WAR - The role of the great armies is now transformed. What direction will war take now?