The American Civil War is often said to have predicted the way in which later wars such as the Boer War and the First World War would be fought. As a result the British Army has been criticized for not heeding its lessons, a view that can be traced back to the 1930s. This book challenges that long-held view, and demonstrates that the responses to the lessons of the war in the British Army were more complex, better informed, and of higher quality, than normally depicted.