Marcomannic Wars: Germanic Tribes Breach the Danube
The Antonine Plague, which swept the empire from 165 CE onward, had weakened Roman frontier defenses just as pressure from Germanic peoples beyond the Danube reached a new intensity. In 166-167 CE a Germanic force crossed the Danube in strength, penetrated Pannonia and Noricum, and raided into northern Italy itself, besieging Aquileia. Marcus Aurelius, the philosopher emperor, took direct command. He recruited slaves and gladiators to fill the depleted legions and settled Germanic prisoners inside the empire as farmers and soldiers. The Meditations, his private philosophical journal, were largely composed in his Danube camps. His death at Vindobona (Vienna) in 180 CE ended the campaigns without resolving the underlying pressures. The Marcomannic Wars previewed the great crisis of the third century: a weakened empire, plague, and relentless external pressure across a too-long frontier.
- Year: 166 CE
- Category: Military
