A severe three-year drought helped bring about a "barbarian" invasion of Roman Britain in A.D. 367, a new study finds.
In that year, Roman troops stationed at Hadrian's Wall on the empire's northern frontier rebelled and three different "barbarian" groups invaded Roman Britain, with the Picts attacking northern Britain from Scotland, the Scotti invading western Britain from Ireland and the Saxons invading southern Britain from the European continent.
