By the end of the fourth century, the Roman Empire was firmly divided into a western and eastern empire. Power had been diffused by diving up the provinces into many small units. This map shows the prefectures and dioceses that were the subdivisions, as well as the area in which the barbarians lived.
1 - Italy - The Growth of Roman Power in Italy
2 - Territorial Expansion of Rome
3 - Northern Africa at the Start of the Second Punic War
4 - Roman Empire 1st Century A.D.
5 - Map of the Extent of the Roman Empire
6 - The Roman Empire about 395
7 - The Roman and Hunnic Empires about 450