Quote:Shortly after Marcus Aurelius came to power in AD 161, the Roman Empire was racked by a series of military crises. While unrest in Britain and a new war with Parthia were swiftly dealt with, the invasion of Roman territory by the Chatti and Chauci peoples heralded a resurgent threat from the empire's European neighbours. Soon the Marcomanni and the Quadi, as well as the Dacians and the Sarmatian Iazyges, would attack the Romans in a series of savage conflicts that continued until AD 175 and would see the first invasion of Roman Italy since the beginning of the 1st century BC.