Constantius II was a Roman Emperor who ruled from 337 to 361 AD. He was the son of Constantine the Great and played a significant role in the early Christian church, supporting the Arian faction during the theological disputes of the time. His reign was marked by military campaigns against the Persian Empire and internal conflicts within the Roman Empire. During his rule, Constantius II faced challenges from usurpers and the growing power of the Germanic tribes. He was known for his administrative reforms and efforts to consolidate power, but his strict policies often led to unrest among the populace. Constantius II died in 361 AD while campaigning against the Persians.