who was known as the caesar of the east

The title "Caesar of the East" historically refers to the Roman emperor Galerius, who was appointed Caesar of the East by Emperor Diocletian during the Tetrarchy system around 293 AD. Galerius was responsible for overseeing the eastern provinces of the Roman Empire and was known for his military campaigns and the persecution of Christians in those regions. Later, the title "Caesar" was also used more broadly as a senior imperial title indicating an heir or junior emperor in the Eastern Roman (Byzantine) Empire, such as Basiliscus who was briefly Caesar of the Eastern Roman Empire in the 5th century AD. However, the most prominent figure known specifically as "Caesar of the East" is Galerius in the late Roman Empire period. Thus, the Caesar of the East is best known as Emperor Galerius, appointed in 293 AD under Diocletian's division of the empire.