when did rome divided into east and west
Western Roman Empire Though the Empire had seen periods with more than one Emperor ruling jointly before, the view that it was impossible for a single emperor to govern the entire Empire was established by Emperor Diocletian following the disastrous civil wars and disintegrations of the Crisis of the 3rd century. His ideas were instituted in Roman law by the introduction of the Tetrarchy in AD 285, which divided the position of Augustus (Emperor) into two; one in the East and one in the West, each with an appointed Caesar (junior Emperor and designated successor). Though the tetrarchic system would collapse in a matter of years, the East-West geographical administrative division would endure in one form or another for centuries to come. As such, the Western Roman Empire would exist intermittently in several periods between the 3rd and 5th centuries. Though some emperors, such as Constantine I and Theodosius I, would manage to rise to the position of Augustus in both halves and as such reunify the Empire, it would often divide again upon their deaths. After the death of Theodosius I in AD 395, the Empire was divided between his sons after which it would never again be unified. Eighty-five years later, in 480, following various invasions and the collapse of central control in the West, Zeno of the Eastern Empire recognized the reality of the Western Empire's reduced domain—effective central control had ceased to exist even in the Italian Peninsula after the depositions of Julius Nepos and Romulus Augustulus—and therefore abolished the Western court and proclaimed himself the sole emperor of the Roman Empire.
Roman Empire The Roman Empire (Latin: Imperium Rōmānum, Classical Latin: [ɪmˈpɛ.ri.ũː roːˈmaː.nũː]; Koine and Medieval Greek: Βασιλεία τῶν Ῥωμαίων, tr. Basileia tōn Rhōmaiōn) was the post-Roman Republic period of the ancient Roman civilization, with a government headed by emperors and large territorial holdings around the Mediterranean Sea in Europe, Africa and Asia. The city of Rome was the largest city in the world c. 100 BC – c. AD 400, with Constantinople (New Rome) becoming the largest around AD 500,[5][6] and the Empire's population grew to an estimated 50 to 90 million inhabitants (roughly 20% of the world's population at the time).[n 7][7] The 500-year-old republic which preceded it had been severely destabilized in a series of civil wars and political conflict, during which Julius Caesar was appointed as perpetual dictator and then assassinated in 44 BC. Civil wars and executions continued, culminating in the victory of Octavian, Caesar's adopted son, over Mark Antony and Cleopatra at the Battle of Actium in 31 BC and the annexation of Egypt. Octavian's power was then unassailable and in 27 BC the Roman Senate formally granted him overarching power and the new title Augustus, effectively marking the end of the Roman Republic.
Tiberius Tiberius (/taɪˈbɪəriəs/; Latin: Tiberius Caesar Divi Augusti filius Augustus;[1][2] 16 November 42 BC – 16 March 37 AD) was Roman emperor from 14 AD to 37 AD, succeeding the first emperor, Augustus.
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