Shapur II

Shapur II launched a major war against the Roman Empire, invading Mesopotamia and Armenia. The war lasted for decades, with Shapur achieving several victories, including the capture of the fortress of Singara. The conflict was marked by sieges, raids, and shifting alliances.

Shapur II initiated a systematic persecution of Christians in the Sassanid Empire, accusing them of sympathizing with the Christian Roman Empire. Churches were destroyed, clergy were executed, and Christians were forced to convert to Zoroastrianism. The persecution lasted for decades.

Shapur II besieged and captured the Roman fortress city of Amida (modern Diyarbakir) after a 73-day siege. The Sassanid forces used siege towers, battering rams, and tunnels to breach the walls. The city was sacked, and its inhabitants were massacred or enslaved.

Shapur II faced the Roman emperor Julian the Apostate, who invaded Sassanid territory and advanced to the capital Ctesiphon. The Romans won a tactical victory outside the city but failed to capture it. Julian was killed in a skirmish, and his successor Jovian made a humiliating peace.

After Julian's death, Shapur II negotiated a peace treaty with the new Roman emperor Jovian. The treaty ceded the Roman provinces of Mesopotamia and Armenia to the Sassanids, including the cities of Nisibis and Singara. This was a major diplomatic victory for Shapur II.