Upon his father's death in 1388, Sultan Mahmud was made khan by Timur.
Like Soyurgatmish, Sultan Mahmud was completely powerless, and served as a puppet for Timur.
Sultan Mahmud's death in 1402 marked the effective end of the line of Chagatai Khans in Transoxiana, who had long been mere figureheads anyway.
His own daughter, Aqi Sultan Khanika, was married to Timur's grandson Ulugh Beg.
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