The treaty granted the Allies the right to occupy Control forts controlling Control the Straits of the Dardanelles and the Bosporus ; and the right to occupy Control `` in case of disorder '' any territory in case of a threat to security .

Commanded Control by the Abbasid heir-apparent , the future Harun al-Rashid , the Abbasid army reached Arriving as far as Chrysopolis , across the Bosporus from the Byzantine capital , Constantinople , while secondary forces Causation raided Attack western Asia Minor and defeated Conquering the Byzantine forces Causation there .

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 .