"Our goal is not an exhaustive history of Europe, Ireland and the UK, but some history is useful when interpreting where people came from, when they settled and how this might be useful for the interpretation of modern DNA studies of these people. - Jim Sims, 2006"

During the Roman civil wars of 260 - 272 two parts of the empire tried to break way. They were both short-lived affairs, but further drained the resources of the central empire.