The fall of the Mongol Empire led to the collapse of the political unity along the Silk Road. Also falling victim were the cultural and economic aspects of its unity. Turkic tribes seized the western end of the Silk Road from the decaying Byzantine Empire, and sowed the seeds of a Turkic culture that would later crystallize into the Ottoman Empire under the Sunni faith. Turkic–Mongol military bands in Iran, after some years of chaos were united under the Saffavid tribe, under whom the modern Iranian nation took shape under the Shiite faith. Meanwhile, Mongol princes in Central Asia were content with Sunni orthodoxy with decentralized princedoms of the Chagatai, Timurid and Uzbek houses. In the Kypchak–Tatar zone, Mongol khanates all but crumbled under the assaults of the Black Death and the rising power of Muscovy. In the East, the native Chinese overthrew the Yuan dynasty in 1368, launching their own Ming dynasty and pursuing a policy of economic isolationism.