After AD 304 the five 'barbarian' tribes divided north China among themselves, setting up dynasties which were often Chinese only in name, and feuding constantly both with each other and with the native states, whose stronghold was now in the south. It was under this barbarian influence that the heavily-armoured cavalry which were to become the striking force of the great T'ang dynasty in the 7th and 8th centuries first developed. In a knowledgeable text complemented by numerous illustrations, this book explores the history, weaponry, tactics and organisation of medieval Chinese armies between 200 BC and AD 589.