How did Marcus aurelius conquered Germany?

Answer 1

Marcus Aurelius did not conquer Germany. He repelled an invasion of Germania Superior by the Chatti in 162. From 166 on he had to deal with the Marcomanni and Quadi who lived in Bohemia (Czech republic) crossed the Danube together with the Lombards and other Germanic peoples and attacked the empire. He fought two Marcomannic Wars wars. When he finally won, he planned to conquer Bohemia. The military campaign was going well. However, he died before its completion. His son Commodus did not want to pursue this undertaking, negotiated a peace treaty and returned to Rome.