when did the roman empire split in two
Western Roman Empire Though Marcellinus does not refer to the Empire as a whole after 395, only referring specifically to its separate halves, he clearly identifies the term "Roman" as applying to the Empire as a whole. When using terms such as "us", "our generals" and "our emperor", Marcellinus distinguished both divisions of the Empire from outside foes such as the Sasanian Persians and the Huns.[139] This view is consistent with the knowledge that contemporary Romans of the fourth and fifth century continued to consider the Empire as a single unit, though more often than not with two rulers instead of one.[83] Though it was the first time the position was divided geographically, the concept of there being more than one emperor at a time was not unprecedented even before Diocletian and the Tetrarchy with there having been several periods where there were more than one co-emperor, such as with Caracalla and Geta 210-211 AD.[141]