In which year did Diocletian sack the Sassanid Persian capital, Ctesiphon?
299
297
301
305
Answer
Diocletian, along with Galerius, successfully campaigned against the Sassanid Persians, the empire's traditional enemy. In 299, they sacked the Sassanid capital, Ctesiphon, and achieved a lasting and favorable peace.
Mastering the Mighty Diocletian: A Roman Emperor's Reign Revealed