The third century crisis came as a result of what three things?

Good Morning! During the third century the Roman Empire went through serious crises in its administrative and political domains. First, in the second century, it faced a civil war by imperial succession, which weakened the political model. Afterwards, the Cyprian Plague decimated thousands of people, and finally the Goths began to have troubling victories to the north, which also motivated the weakening of the Roman army. Hugs!