After the death of Constantine, the Roman Empire was split into 2 empires.Look at the map that shows some of the external problems that the empire's face didn't answer the blood question belowAfter the death of Constantine, the Roman Empire was split into 2 empires. Look at the map that shows some of the external problems that the Empire's face didn't answer the block question below.

What were some of the external problems that the Roman Empire faced after the death of Constantine?