In the years 421-422, the Eastern Roman Empire waged another war with the Sassanid State. The troops, led by magister militum per orientem Ardabur, entered Persian Mesopotamia but were quickly driven back by superior Persian forces.
Roman forces dug in at Theodosiopolis waiting for the Sassanid army. However, the Persians were prevented from quickly capturing Theodosiopolis by rebellions in Armenia and Iberia, while the Romans were waiting for reinforcements. After all, according to Socrates Scholasticus, the war was to be decided by a duel. The Persian side was represented by Ardazanes and the Roman side by Areobindos. Aerobindos won the duel.
However, this story may not have happened, or it could be an action that will drag out the war a bit. The fact is, however, that soon both sides started negotiations and the war ended with the status quo.