When did the Roman Empire fall?
Fall of the Western Roman Empire
By convention, the Western Roman Empire is deemed to have ended on 4 September 476, when Odoacer deposed Romulus Augustulus and proclaimed himself ruler of Italy, but this convention is subject to many qualifications. In Roman constitutional theory, the Empire was still simply united under one emperor, implying no abandonment of territorial claims. In areas where the convulsions of the dying Empire had made organized self-defence legitimate, rump states continued under some form of Roman rule after 476. Julius Nepos still claimed to be Emperor of the West and controlled Dalmatia until his murder in 480. Syagrius son of Aegidius ruled the Domain of Soissons until his murder in 487.[215] The indigenous inhabitants of Mauretania developed kingdoms of their own, independent of the Vandals, with strong Roman traits. They again sought Imperial recognition with the reconquests of Justinian I, and they put up effective resistance to the Muslim conquest of the Maghreb.[216] While the civitates of Britannia sank into a level of material development inferior even to their pre-Roman Iron Age ancestors,[217] they maintained identifiably Roman traits for some time, and they continued to look to their own defence as Honorius had authorized.[218][219]
Barbarian kingdoms
These kingdoms were "" of the Roman Empire, and even after the fall of the Western Roman Empire in AD 476 they continued to at least nominally consider themselves subject to the Eastern Emperor. These historical ties with the empire were weakened in the later 6th century, with the loss of much of the western possessions of the empire under Justin II and the waning power projection by the empire, weakened by its wars with the Persians and the Arab invasion.