In 1553 Suleiman began his third and final campaign against the Shah. Having initially lost territories in Erzurum to the Shah's son, Suleiman retaliated by recapturing Erzurum, crossing the Upper Euphrates and laying waste to parts of Persia. The Shah's army continued its strategy of avoiding the Ottomans, leading to a stalemate from which neither army made any significant gain. In 1555, a settlement known as the Peace of Amasya was signed, which defined the borders of the two empires. By this treaty, Armenia and Georgia were divided equally between the two, with Western Armenia, western Kurdistan, and western Georgia (incl. western Samtskhe) falling in Ottoman hands while Eastern Armenia, eastern Kurdistan, and eastern Georgia (incl. eastern Samtskhe) stayed in Safavid hands. The Ottoman Empire obtained most of Iraq, including Baghdad, which gave them access to the Persian Gulf, while the Persians retained their former capital Tabriz and all their other northwestern territories in the Caucasus and as they were prior to the wars, such as Dagestan and all of what is now Azerbaijan.