Generals preparing to go to war are, we are often told, fond of reading military classics on the Art of War. Some of the stories may be apocryphal - did Norman Schwarzkopf really have a copy of the ancient Chinese strategist Sunzi on the subject in his back pocket when he launched the Gulf War, or did Napoleon have it at his bedside? - but it is certainly studied widely, along with Machiavelli's essay of the same title, and Clausewitz's On War, at West Point, Sandhurst and Saint Cyr. So are the strategies and manoeuvres of classical military engagements from the Greco-Persian Wars of the 5th century BC through to the Crimean and Franco-Prussian Wars of the 19th century and on into the world conflicts of the 20th century. The curriculum of the PLA National Defence Academy in Beijing, which claims to be China's equivalent of West Point, no doubt has a similar historical and geographical breadth. The academic study of war, while recognising the shift to what is generally called ‘modern warfare’ brought about by the Napoleonic wars (or, in some views, rather earlier) also takes a longer and wider view of the subject. As the British war studies professor Lawrence Freedman has observed, ‘The [strategic] debates of today can be traced back to those of classical times, so that Thucydides’ account of the Peloponnesian wars from 400 BC can still serve as a starting point for analyses of the causes of war while Machiavelli can still be read with profit by aspiring strategists.’