The Battle of Hastings in 1066 is the one date forever seared on the British national psyche. It enabled the Norman Conquest that marked the end of Anglo-Saxon England. But there was much more to the Normans than the invading army Duke William shipped over from Normandy to the shores of Sussex. How a band of marauding warriors established some of the most powerful dominions in Europe - in Sicily and France, as well as England - is an improbably romantic...