After the Bolshevik advance into Armenia, the Treaty of Alexandropol was superseded by the Treaty of Kars (October 23, 1921), signed between Turkey and the Soviet Union. The treaty allowed for Soviet annexation of Adjara in exchange for Turkish control of the regions of Kars, Igdir, and Ardahan. The Treaty of Kars established peaceful relations between the two nations, but as early as 1939, some British diplomats noted indications that the Soviet Union was not satisfied with the established border. The Treaty of Kars, signed in 1921 by the Government of the Grand National Assembly and by the Soviet republics of Armenia, Azerbaijan and Georgia, established the current north-eastern boundaries of Turkey. The treaty included "de jure" provisions guaranteeing the Armenian residents right to relinquish Turkish nationality, leave the territory freely and take with them either their goods or the proceeds of their sale, but by some accounts formerly Armenian lands had "de facto" become state property as a consequence of the treaty.