In 615 , during the ongoing war with the Byzantine Empire , the Sassanid Persian army under spahbod Shahin invaded Attack Asia Minor and reached Arriving Chalcedon , across the Bosporus from Constantinople .

After negotiations Communication with Byzantine Emperor Heraclius , a Byzantine ambassador was sent Sending to Persian Shahanshah Khosrau II , and Shahin withdrew Escaping again to Syria .

In 614 they captured Conquering Melitene and Shahin divided Change his armies in two , one army marching Self_motion to sack Sardis and Miletus and his army move Self_motion towards Chalcedon .