Late Roman Empire, Constantinian Dynasty; 55*Constantius-I Chlorus (W), 58*Maxentius 61*Maximinus II Daia (W); Tetrarchic Wars (306-324): Licinius/Maximinus II Dias Civil War (313) [6/12]

Licinius engaged Maximinus on the Campus Serenus at Tzirallum (Thracia). The battle was a rout, and Maximinus fled back to Tarsus where he died a short time later, putting Licinius in possession of all the Eastern provinces.

Around this Constantine suggested handing over Italy to a new caesar, a certain Bassianus (d.316), who although married to another half-sister of Constantine, Anastasia, was also closely associated with Licinius. When it emerged that Bassianus’ brother Senecio, who was in service with Licinius, was behind a plot to assassinate Constantine, Licinius, justly or unjustly, was accused of instigating the plot. Constantine put Bassianus to death and demanded Senecio, who was in Licinius’ territory, should be handed over. Licinius refused and the relationship between the two augusti was broken.