Leontius, a Roman usurper, ascended to the throne as the Eastern emperor at Tarsus, a city situated in modern-day Turkey. This moment marked an important episode in a period characterized by political turmoil and fragmentation within the Roman Empire. Leontius emerged as a leader during a time when the empire was grappling with multiple internal divisions and external threats.

After successfully seizing control of the Eastern provinces, Leontius sought to legitimize his authority. His coronation in Tarsus symbolized a direct challenge to the existing Byzantine rule. Following his recognition in Antioch, a significant urban center and a hub of power, Leontius established the city as his capital. This move not only fortified his position but also aimed to rally support among the local elite and military factions discontent with the Byzantine regime.

Leontius' reign was characterized by efforts to consolidate power and stabilize the region amidst the backdrop of political instability. His administration, however, faced immediate challenges, including resistance from loyalists and competing claimants. The dynamics of Eastern Roman politics during Leontius's tenure reflected a broader narrative of rival factions attempting to assert control in a fragmented empire.