Men, ideas and tanks reviews the development of British military ideas on armoured forces from 1903 to 1939. Great Britain was the nation which first developed the tank, first used it in action and first gained dramatic results by employment. The British continued to be world leaders in the field of mechanised warfare until the early 1930s. J. P. Harris offers strikingly new interpretations of the early history of British armoured forces and explains why Great Britain had lost the lead by the outbreak of the Second World War. This work will be of interest to all those concerned with British military history in the first half of the twentieth century, with the history of mechanised warfare and with the history of military thought.