Around 337 Shapur II invaded Roman Mesopotamia, commencing a drawn out war.
Shapur besieged and captured Bet Zabdai.
The prisoners were set on a long march to Bet Huzaje.
Along the way, Heliodorus fell ill and named the priest Dausa as his successor.
[1] He died as a result of ill treatment and fatigue at Daskarata on the Great Zab, in 344.