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

Marcus Aurelius' campaigns against the Germanic tribes were largely successful in securing the northern frontier of the Roman Empire. He repelled several major invasions and established a number of new fortifications along the Danube and Rhine rivers. These measures helped to keep the Germanic tribes at bay for several decades after his death.

However, Aurelius' wars were also very costly in terms of manpower and resources. He was forced to raise taxes and increase military spending, which put a strain on the economy. The constant warfare also led to a decline in morale among the Roman soldiers.

In the long term, Aurelius' campaigns may have actually contributed to the decline of the Roman Empire. By weakening the economy and the military, they made the empire more vulnerable to future invasions. Additionally, the constant warfare may have led to a decline in civic virtue and social cohesion, which further weakened the empire.

Overall, it is difficult to say whether Aurelius' campaigns were a success or a failure. They did achieve their immediate goal of securing the northern frontier of the empire, but they also had a number of negative consequences that may have contributed to the decline of the empire in the long term.