Battle of Tzirallum

The Battle of Tzirallum was one of the civil wars of the Tetrarchy fought on 30 April 313 between the Roman armies of emperors Licinius and Maximinus. The battle location was on the "Campus Serenus" at Tzirallum, identified as the modern-day town of Çorlu, in Tekirdağ Province, in the Turkish region of Eastern Thrace. Sources put the battle between 18 and 36 Roman miles from Heraclea Perinthus, the modern-day town of Marmara Ereğlisi.
After the death of Galerius in 311 A.D., there remained four emperors in the Roman world: Constantine I, who controlled Gaul, Spain and Britain; Maxentius, in Africa and Italy; Maximinus Daza in Roman Asia and Egypt; and Licinus in Macedonia, Greece and Illyricum; The expansionist ambitions of Maxentius and Maximin led to a bellicose alliance of these princes against Constantine and Licinus, with the understanding that Maxentius would conquer the western provinces of Europe, and Maximin the east. Constantine, sensing the threat, in turn drew closer to Licinus, and having assured himself of the latter's overt neutrality and secret support, unexpectedly attacked Maxentius in 312. Constantine invaded Italy and defeated Maxentius in a lightning campaign which culminated in the battle of the Milvian Bridge where the latter was killed. After reducing the last holdouts of Maxentius' partizans, the victor addressed a friendly dispatch to Licinus, arranging to meet him at Milan where the Illyrian emperor was to wed his sister, in a formal ratification and celebration of their alliance. Meanwhile Maximinus, on the basis of his agreement with Maxentius, had been mobilizing for war, though he concealed his intentions from Licinus with carefulness and success; as soon as his forces were prepared, though it was the middle of winter, he marched hurriedly with his army of 70,000 men through Anatolia from Antioch, arriving opposite Byzantium while the Illyrian emperor was still at Milan. Maximinus' anxiety to catch Licinus unprepared had led to much equipment, not to mention morale, being lost in the winter march through the harsh provinces of Asia-Minor. As soon as Licinus received the intelligence of the enemy's attack, Licinus hastened from Milan to meet the invasion, assembling the resources of Illyria in his hurried course through the province. Maximin had crossed the Bosphorus, captured Byzantium, and then besieged the town of Heraclea Perinthus, which he captured after a siege of eight days. Maximinus moved ahead to the "first station", 18 miles beyond Heraclea. On arriving there, news reached him that Licinius, coming from Adrianople had already pitched camp with his force at the second station, 18 miles further ahead. Because of the scant time allowed him for preparation, Licinus was outnumbered by over two to one, possessing only 30,000 soldiers. It is recorded that an attempt at negotiation took place before the conflict, but was broken off after bad faith was revealed on both sides, after which it was decided to settle the matter by arms. The battle location, Tzirallum, is identified with the contemporary town of Tzouroulon, which is the modern Turkish city of Çorlu.

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