84)
Arriving in mid-summer of 78, Agricola found several previously defeated peoples had re-established their independence. The first to be dealt with were the Ordovices of north Wales, who had destroyed a cavalry ala of Roman auxiliaries stationed in their territory. Knowing the terrain from his prior military service in Britain, he was able to move quickly to defeat and virtually exterminate them. He then invaded Anglesey, forcing the inhabitants to sue for peace. The following year he moved against the Brigantes of northern England and the Selgovae along the southern coast of Scotland, using overwhelming military power to re-establish Roman control.
Read more about this topic: Roman Conquest Of Britain, Agricola (governor 78