The recent Afghanistan and Iraq wars were very controversial. The conflicts' casualties, intractability and the apparent failure of the US and its allies to achieve their objectives mean that many see the wars as failures. This resulted in a loss of confidence in the West of the utility of force as an instrument of state power. Both wars have been well described by journalists. There is no shortage of memoirs. But there is little discussion of how the conduct of these wars and capabilities of the forces involved changed and evolved, and of the implications of these developments for future...