Constantine the Great vs Eannatum

Constantine defeated his rival Maxentius at the Milvian Bridge near Rome. According to tradition, Constantine saw a vision of a cross in the sky with the words 'In this sign, conquer.' The victory made Constantine the sole ruler of the Western Roman Empire and led to his conversion to Christianity.

Constantine and his co-emperor Licinius issued the Edict of Milan, granting religious toleration to all religions in the Roman Empire, including Christianity. The edict ended the persecution of Christians, restored confiscated church property, and established Christianity as a legally recognized religion.

Constantine defeated his co-emperor Licinius at the battles of Adrianople and Chrysopolis, ending the Tetrarchy system. He became the sole ruler of the entire Roman Empire, reuniting the Western and Eastern halves under his control. This reunification was the last time the Roman Empire was united under a single ruler.

Constantine convened the First Council of Nicaea, the first ecumenical council of the Christian Church, to resolve the Arian controversy over the nature of Christ. The council produced the Nicene Creed, affirming the divinity of Christ and establishing a unified Christian doctrine. Constantine presided over the council.

Constantine dedicated the city of Constantinople (modern Istanbul) as the new capital of the Roman Empire, built on the site of the ancient Greek city of Byzantium. The city was strategically located on the Bosporus strait, controlling trade routes between Europe and Asia. It became the capital of the Eastern Roman Empire for over a thousand years.

Eannatum defeated the forces of Umma in a battle near the boundary canal between Lagash and Umma. The victory was commemorated on the Stele of the Vultures, which shows vultures carrying away the heads of the defeated. This established Lagash's dominance over Umma.

Eannatum, king of Lagash, commissioned the Stele of the Vultures, the first known historical document. The stele depicts his victory over Umma and records the boundary treaty between the two city-states. It is a key source for early Sumerian warfare and diplomacy.

Eannatum campaigned against Elam and Subartu, extending Lagash's influence beyond Sumer. Inscriptions record his victories and the tribute he exacted from these regions. This expansion made Lagash a major power in Mesopotamia during his reign.