Unlike his father and brother, Thoros survived his incarceration in Constantinople and was able to escape in 1143. Whatever the conditions in which Thoros entered Cilicia, he found it occupied by many Greek garrisons. He rallied around him the Armenians in the eastern parts of Cilicia and after a persistent and relentless pursuit of the Greeks, he successfully ousted the Byzantine garrisons from Pardzerpert (now Andırın in Turkey), Vahka, Sis (today Kozan in Turkey), Anazarbus, Adana, Mamistra and eventually Tarsus. His victories were aided by the lack of Muslim attacks in Cilicia and from the setbacks the Greeks and the Crusaders suffered on the heels of the Siege of Edessa in 1144.