Did Marcus Aurelius constant wars against the Germans secure Rome for the future or did they drain and weaken Rome?

Answer 1

The Germans did not exist in antiquity. There were many Germanic peoples who were the ancestors of today's Germans, Dutch, Danes, Swedes, Norwegians and the English.

The wars of Marcus Aurelius secured the integrity of the eastern part of the Roman Empire. If he had not fought back the invasions of this part of the empire empire by Germanic peoples, they would have taken over much of the region south of the River Danube (which was the northern frontier of the eastern part of the Roman Empire). His victories stopped these peoples from tying to invade this part of the empire again. The next attempts to invade this part of the empire eighty-seven years later were by other (also Germanic) peoples. The successes of Marcus Aurelius could have strengthened the empire. Unfortunately, he died while he was campaigning to conquer the territory of the Marcomanni, the main threat to the empire in those wars, and was succeeded by his son, Commodus, who was one of the most incompetent emperors in Roman history and the most cruel one. His reign marked the beginning of the emperors losing authority and civil wars among the Romans which weakened the empire and once again exposed it renewed raids , both in the east and in the west, by other Germanic peoples.