Book excerpt: Orchestrating Warfighting provides a detailed and wide-ranging examination of the employment of corps and divisions from the First World War through to the early twenty-first century. Division and corps formations have been at the forefront of the British Army’s prosecution of war since 1914. They constituted the major command and organisational elements that underpinned the conduct of large-scale warfighting on land. Divisions and corps were of central importance to the conduct of the First and Second World Wars, the maintenance of a conventional deterrence posture during the Cold War, and were also employed in major confrontations since 1945, including the Korean War and two Gulf Wars. The British Army of the early twenty-first century still retains two divisional formations alongside the British-led Allied Rapid Reaction Corps within NATO. Orchestrating Warfighting examines British, Dominion, and imperial corps and divisions, taking part in the total wars of the first half of the twentieth century and smaller scale conflicts since 1945. It throws new light on questions of command, generalship, and the management of battles and campaigns across a diverse range of theatres. Orchestrating Warfighting is of interest to historians of the British Army, operational military history, and modern war.