This is the abstract of my contribution to A Military Transformed? Transformation and Innovation in the British Military from 1792 to 1945, a forthcoming book edited by Ross Mahoney, Stuart Mitchell and Michael LoCicero of the University of Birmingham. The chapters are based on papers given at a conference in April 2011. See Ross’s blog, Thoughts in Military History, for more details on the book. He is in the process of adding the abstracts to his blog; they are all tagged ‘transformation.’