sentences:  Having played a vital role in restoring Khosrow II to the throne, the Byzantines were left in a dominant position in their relations with Persia.Khosrow not only returned Dara and Martyropolis in exchange for Maurice's assistance, but also agreed to a new partition of the Caucasus by which the Sassanids handed over to the Byzantines many cities, including Tigranokert, Manzikert, Baguana, Valarsakert, Bagaran, Vardkesavan, Yerevan, Ani, Kars, and Zarisat.The western part of the Kingdom of Iberia, including the cities of Ardahan, Lori, Dmanisi, Lomsia, Mtskheta, and Tontio became Byzantine dependencies.