The Great Conspiracy - The History of Rome Mike Duncan

What was the great conspiracy of the title?  It refers to a huge co-ordinated attack on the province of Britain by Picts, Irish, Franks and the Germanic tribe that was to have a surprisingly impressive CV later in history, the Saxons.  Sorting out this conspiracy was going to allow a new dynasty to emerge.  For a foggy out of the way island where it rains a lot, Britain was to play a disproportionate role in the history of the empire.