'Never, except in the battle of Cannae, had there been so destructive a slaughter recorded in our annals.' Thus the Roman historian Ammianus Marcellinus recorded the battle of Adrianople, which spelied the beginning of the end of the Roman Empire. Such a crushing Roman defeat by Gothic cavalry proved to the Empire, as well as to the Goths themselves, that the migratory barbarians were a force to be reckoned with. Simon Macdowall tells the story of the misguided Roman plans and the surprise attack of Gothic cavalry, and puts forward the most recent theories as to the true location of the battlefield.