Shahin's invasion of Asia Minor (615)

In 615, during the ongoing war with the Byzantine Empire, the Sassanid Persian army under spahbod Shahin invaded Asia Minor and reached Chalcedon, across the Bosporus from Constantinople. The Sassanids had already captured Roman Syria and Palestine in the previous year. After negotiations with Byzantine Emperor Heraclius, a Byzantine ambassador was sent to Persian Shahanshah Khosrau II, and Shahin withdrew again to Syria.

This was not the first time the Persians drew up their armies at the walls of Constantinople, but this time the invasion was more widespread. Beginning in 614 the Persians encroached on Asia Minor. In 614 they captured Melitene and Shahin divided his armies in two, one army marching to sack Sardis and Miletus and his army move towards Chalcedon. Despite the successful retreat back to Syria, the Persians did keep Caesarea (modern Kayseri) and the key Armenian fortresses of Theodosiopolis (modern Erzurum and Martyropolis. '