Heraclius: The Byzantine emperor who crushed the Persians and established Greek as the official language

The peace agreement with the Avars – The beginning of the campaign – Heraclius’ first victories – The failed siege of Constantinople by Persians, Avars, and Slavs (626) – The Battle of Nineveh (627) – Dorkon, the “Bucephalus” of Heraclius – The triumph of the Byzantines and the restoration of the Holy Cross in Jerusalem