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316 Battle of Cibalae ★ ★ ★ ★ ★
Outcome: Crushing victory of Constantine over the army of Licinius 8 October 316
War  &  Enemy: Enemy:
Romans (Civil War)
Civil Wars of the Tetrarchy (306-324 AD)
Battle Type:
Pitched Battle
The Battlefield Cibalae Location:
At Aurelia Cibalae, probably modern Vinkovci between the Drava and Sava Rivers in Croatia.
Modern Country:
  The Byzantines(emperor:  Tetrarchy) The Enemies
Commander: Constantine I the Great Licinius, Augustus of the East
Forces: 20,000 35,000
Losses: 20,000
Background story: In 314, a civil war erupted between Licinius and Constantine. The hostilities were prompted by Constantine's appointment of his brother-in-law, Bassianus, as his Caesar. Bassianus was discovered to be intriguing against Constantine, perhaps at the prodding of his own brother Senecio, a close associate of Licinius.
When Constantine demanded that Licinius hand over Senecio, Licinius refused. Constantine, then, marched against him
The Battle:
Constantine I the Great
At Cibalae (probably Vinkovci in modern Croatia), the two rivals fought to exhaustion. The battle lasted all day. Following a period of skirmishing and missile fire at a distance the main bodies of the armies met in close combat. A fierce hand-to-hand fight ensued.
This battle of attrition was ended, late in the day, when Constantine personally led a cavalry charge from the right wing of his army. The charge was decisive and the Licinius’ ranks were broken. As many as 20,000 of Licinius’ troops were killed in the hard-fought battle. The surviving cavalry of the defeated army accompanied Licinius when he fled the field under the cover of darkness.
Aftermath: Following the battle, Licinius was forced to flee to Sirmium, and then, after collecting his family and treasury, to Thrace. Peace negotiations were initiated, but they broke down. A further battle was then fought, the Battle of Mardia.