Prince Shapur I becomes co-ruler of the Sasanian Empire with his father King Ardashir I. Maharaja Sri-Gupta becomes ruler of the Gupta Empire (approximate date). Mani, a young mystic of Ctesiphon, proclaims himself a prophet at the court of Ardashir I. He preaches his doctrine, Manichaeism, throughout the Sassanid Empire.
Geopolitics & Diplomacy
Maharaja Sri-Gupta becomes ruler of the Gupta Empire (approximate date).source
Conflict & Security
The Roman Empire is threatened on several fronts at the same time. Africa revolts and tribes in northwest Germania, under the name of the Franks, are raiding the Rhine frontier.source
Siege of Hatra: The Sasanians besiege the capital of the Kingdom of Hatra ruled by Sanatruq II.source
Religion & Belief
Mani, a young mystic of Ctesiphon, proclaims himself a prophet at the court of Ardashir I. He preaches his doctrine, Manichaeism, throughout the Sassanid Empire.source
Culture & Society
April 12 – Prince Shapur I becomes co-ruler of the Sasanian Empire with his father King Ardashir I.source
Births
Zenobia, queen of the Palmyrene Empire (d. 274)source
Lucian of Antioch, Syrian theologian and martyr (d. 312)source
Sporus of Nicaea, Greek mathematician (approximate date)source
Deaths
Herodian of Antioch, Roman historian and writer (b. 170)source