In the ongoing effort to stabilize the Roman Empire, Emperors Diocletian and Maximian appointed Galerius as Caesar, marking a pivotal moment in the establishment of the Tetrarchy. This innovative governance structure was designed to address the vastness and challenges of ruling the empire, particularly during a time of external threats and internal dissent. By appointing Caesars, Diocletian intended to delegate authority and improve the administrative efficiency of the empire. Galerius, initially a close military ally of Diocletian, was recognized for his capabilities and offered a prominent role to help oversee the eastern provinces.

The Tetrarchic system divided the empire into four regions, each governed by an emperor or a Caesar, enabling each ruler to focus on local issues while maintaining overall unity. While Diocletian and Maximian reigned as Augusti, the presence of Galerius and later Constantius Chlorus as fellow Caers ensured a collaborative leadership that could address threats that arose simultaneously across different frontiers. The dynamics of power shifted significantly, enabling a more pragmatic approach to governance that had lasting effects on Roman rule for years to come.

This arrangement not only helped manage the complexities of an expansive empire but also fostered a sense of stability in the political structure. The Tetrarchs often held ceremonial meetings and coordinated military campaigns to protect the empire. Over time, however, tensions between the various leaders began to surface, leading to conflict as ambitions and rivalries escalated. Nonetheless, the initial appointment of Galerius set the stage for crucial developments in governance and military reforms that would influence the trajectory of the empire into the next century.