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| - 301 Northern China is swept up by barbarian invasions; there begins the Sixteen Kingdoms era. 303 Armenia converts to Christianity under king Tiridates V by the work of St. Gregory the Illuminator. 303-306 Last heavy round of persecution against Christians in the Roman Empire under Diocletian and the Tetrarchs. 304 Liu Yuan-Hai, Lord of the southern Xiongnu/Huns, founds in the Shanxi region th Hunnic Han/Zhou imperial dynasty; eastern Turkestan rejects his authority and the local Indoeuropean Tocharian kingdoms (partly Zoroastrian, partly Buddhist) regain complete independence. 305 Diocletian abdicates voluntarily, forcing his colleague Maximian to follow his example; Constantius Chlorus rules the Roman West with Flavius Severus as his Caesar (vice-emperor), whereas Galerius rules the East with Maximinus Daia as Caesar. Khorezm (region between the Caspian Sea, The Aral lake and the Amu Darja) overthrows Persian suzerainty and becomes a free state under the Afrigids. 306 The Tetrarchy crumbles upon the death of Constantius Chlorus; his son Constantine is hailed as emperor in Britannia, while in Rome Maxentius, son of Maximian, becomes emperor. 307 War of succession in China inside the Jin dynasty. Constantine and Maxentius defeat and kill Flavius Severus, Constantius Chlorus’ legitimate Caesar and heir. Subsequently Maximian chooses to support his son-in-law Constantine over his own son Maxentius. Galerius’ invasion of Italy aborts quickly. 308 At the conference of Carnuntum Licinius, a close friend of Galerius, is appointed Augustus (that is, full emperor) of Pannonia (modern Hungary west of the Danube, parts of Austria and Croatia) with a right to the lands currently under the sway of Maxentius (Italy, Spain, Africa). 310 Besieged in Massilia/Marseille by his son-in-law Constantine, Maximian kills himself. Maximinus Daia has himself proclaimed emperor in Syria; the Roman Empire is now carved up amongst no less than five pretenders (Constantine, Maxentius, Licinius, Galerius and Maximinus Daia). ca. 310 The Axumite Ethiopians conquer the kingdom of Himyar (Yemen), which becomes a vassal to Axum. 311 The Chinese capital of Luoyang is taken and destroyed by Liu Yuan-Hai’s Xiongnu/Huns. In the Roman empire Galerius quits the persecution against Christians, then dies, and Licinius takes over his domains in the Sklaviniai (*OTL Balkans), while Maximinus Daia extends his power to all of Anatolia. Berber revolt led by Alexander in eastern Numidia; the imperial army razes to the ground the city of Cirta, subsequently refounded with the name of Costantina. 312 Constantine defeats Maxentius at Verona and Milvius Bridge/Saxa Rubra, entering Rome as the victor and the ruler of Roman West; just before the battle at Milvius bridge a cross is said to appear in the sky (“In hoc signo vinces”, “Through this sign you’ll win”) and Constantine considers conversion to Christianity. 312-316 Donatist schism in the African Church of Carthage. Its cause is the request by local Christians to elect their bishop instead of waiting for an appointment from Rome. Constantine sides with the Roman bishop, but the reasons behind the schism endure; Donatists will characterize themselves as an autonomous African force, known for their martyr-worship, their refusal to pardon “unworthy” priests (those who backed down under the persecutions renegading the faith) and to accept the Church-State alliance sealed under Constantine. 313 Edict of Milan. Constantine and Licinius, now allies, recognize Christianity and proclaim it a State tolerated religion. After that Licinius reverts to his domanins in the Sklaviniai (*OTL Balkans) and decisively defeats Maximinus Daia at Campus Serenus near Adrianople, then pursues him through Asia Minor and besieges his enemy at Tarsus in Cilicia. On Maximinus’ death, Licinius obtains the entire Roman East. 313-668 Three Kingdoms (Koguryo, Paekche and Silla) era in Korea. 314 The reign of Caucasian Albania (*OTL Azerbaijan) converts to Christianity under king Urnayr – but the country, firmly in the Persian sphere of influence, will long reamin divided between Christians and Zoroastrians. Constantine appoints his brother-in-law Bassianus as Caesar in Italy and Pannonia (which was Licinius’ domain); Licinius, in turn, fosters a rebellion by Bassianus which is promptly crushed. 316 Constantine wrests from Licinius the Sklaviniai (*OTL Balkans), except for Thrace, after the battle of Cibalae (Pannonia), then after a new inconclusive battle at Campus Ardiensis, the two rivals divide anew the Roman Empire between themselves, recognizing the “status quo”. Members of the Jin dynasty of China refound an eastern Jin empire based in Nanking after the barbarians overrun northern China. 317 Liu Yuan-Hai, the Hunnic emperor of northern China founder of the self-proclaimed Han/Zhou dynasty, dies in Chang’an/Xian. 318 Chandragupta I, son-in-law of the Licchavi ruler of Magadha (India), obtains Pataliputra/Patna as a dowry, thus founding the Gupta dynasty and empire. 319 Arius starts preaching in Alexandria the Arian version (heresy) of Christianity, which will gain wide acceptance amongst newly Christianized barbarians. 320 The island of Dioskoris/Socotra, previously under Himyar’s control, is annexed by the Hadramaut kingdom. ca. 320 Under Kidara I the Red Huns or Chionites create a kingdom between Bactria (Afghanistan) and Central Asia after vanquishing the local Kushanshas, puppet rulers for the Persians Sassanids. In the lake Van region two Armenian principalities emerge: Rshtuniq under the Rshtuni dynasty and Vaspurakan under the Artzrunis. In the Roman Empire Licinius reverts to an anti-Christian policy whilst Constantine is more and more pro-Christian.
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