Constantine Defeats Licinius at Adrianople
In the early fourth century, the Roman Empire remained divided between rival emperors following the collapse of the Tetrarchy system established by Diocletian. Constantine I, controlling the western provinces, clashed repeatedly with his eastern co-ruler Licinius over supreme authority. On July 3, 324, their armies met near Adrianople in Thrace, where Constantine deployed superior tactics including a feigned retreat that allowed his forces to cross the Hebrus River and envelop the enemy. Licinius suffered heavy losses exceeding 34,000 men and fled toward Byzantium. The victory consolidated Constantine's position and paved the way for his eventual sole rule after further campaigns.