On 9 April 1929 a treaty was signed in Ankara between Turkey and Iran to further delimit their border, partly in response to the Kurdish Ararat rebellion; this was then finalised at the 1932 Tehran Convention, resulting in some small exchanges of territory in the vicinity of Little Ararat, Bazhergah and Qotur. The border was then demarcated and a final agreement signed in Tehran on 26 May 1937.