In Episode 63 of Fexingo History, Lucas and Luna dive into the bloody civil war that tore apart the Chagatai Khanate in the 1260s–70s. After Genghis Khan's death, his second son Chagatai received Transoxiana and the steppes, but by the 1260s, the khanate was split between two factions: the conservative, nomadic Moghulistan under Baraq Khan and the urban, Muslim-influenced western khanate under Mas'ud Beg. Lucas recounts the 1270 Battle of Qara Su, where Baraq's forces clashed with Kaidu's armies, and traces the rise of the Qara'unas, a mixed Mongol-Iranian group. The episode explores how the Chagatai Khanate's internal conflicts weakened it, paving the way for Timur's rise a century later. Discover the role of the Yasa vs. Sharia tension, the economic struggle between nomads and city-dwellers, and the little-known figure of Negübei, a puppet khan. This is a deep dive into a lesser-known chapter of Mongol fragmentation, perfect for history lovers who want specifics: dates, names, and battles.