Heraclius' campaign of 622

[1] His young son, Heraclius Constantine, was left behind as regent under the charge of Patriarch Sergius and the patrician Bonus.

In order to threaten both the Persian forces in Anatolia and Syria, his first move was to sail from Constantinople to Pylae in Bithynia (not in Cilicia).

In the autumn, Heraclius threatened the Persian communications to Anatolia from the Euphrates valley by marching to northern Cappadocia.

[3] What followed next is not entirely clear, but Heraclius certainly won a crushing victory over Shahrbaraz somewhere in Cappadocia.

However, Heraclius had to return to Constantinople to deal with the threat posed to his Balkan domains by the Avars, and left his army to winter in Pontus.