Nevertheless, he was soon restored to his position, as he was present in Murad's 1446 campaign against the Morea. Murad was reportedly disheartened by the strength of the Hexamilion, but Turahan insisted on an assault. Aided by an artillery bombardment, the Ottomans again breached the Byzantine defences and ravaged the Peloponnese at will. As a result, the Despotate of the Morea was now officially reduced to an Ottoman vassal state. In early October 1452, Turahan and his sons Ahmed and Ömer led a large force into the Peloponnese. Sultan Mehmed II ordered them to remain there during the winter in order to prevent despots Thomas and Demetrios from assisting their brother, Emperor Constantine XI, during the Siege of Constantinople in 1453. Turahan again stormed the Hexamilion and penetrated into the Morea, raiding from Corinth through the Argolid and Arcadia to Messenia. The Byzantines put up little resistance after Hexamilion, although Turahan's son Ahmed was captured in an ambush at Dervenakia and imprisoned in Mystras.