Constantine prevails again against his Eastern counterpart…
317 CE
Constantine prevails again against his Eastern counterpart Licinius (shortly after he had named as co-emperor Valerius Valens, who had previously been dux limitis in Dacia) in the plain of Mardia (also known as Campus Ardiensis) in Thrace.
The emperors are reconciled after this battle.
Licinius according to a peace signed on March 1, 317, has to execute Valerius Valens, and cedes territory to Constantine, including …