After the death of Genghis Khan, his second son Chagatai received an appanage (ulus) in Central Asia (including Transoxiana and parts of the Tarim Basin), forming the political nucleus later known as the Chagatai Khanate.
Chagatai Khan died, triggering a succession pattern in which elites and regents often exercised strong influence—an early sign of the khanate’s recurring tensions between dynastic legitimacy and powerful commanders.
During Baraq’s reign, Chagatai leadership more openly resisted directives from the Yuan Great Khan, marking a shift toward greater autonomy within the post-imperial Mongol world.
A prolonged conflict erupted between Kaidu (Ögedeid leader allied with/controlling Chagatai politics) and Kublai Khan’s Yuan regime. The war deepened the political separation of the Mongol successor states and shaped Chagatai factional alignments for decades.
Baraq’s invasion toward Ilkhanid territory ended in defeat near Herat (recorded as 22 July 1270 in standard accounts). The setback weakened his position and facilitated Kaidu’s dominance over Chagatai affairs.
Duwa ruled for a long reign and is commonly described as overseeing a high point of Chagatai strength while also managing relations with neighboring Mongol states, including the Yuan.
Kaidu’s death helped open the way to a broader détente (often dated 1304) between the Yuan and western Mongol polities, reducing immediate pressure on Chagatai politics even as internal factionalism persisted.
War between the Chagatai Khanate (under Esen Buqa I) and the Yuan dynasty (under Ayurbarwada Buyantu Khan) began, with the Ilkhanate aligned with Yuan. The conflict reflected the continuing instability of Mongol interstate relations in Inner Asia.
Under Kebek (second reign), the khanate pursued administrative and economic stabilization, including wider use of standardized coinage and the rise of Qarshi as a key political center.
Tarmashirin adopted and promoted Islam, intensifying tensions with constituencies attached to older Mongol religious traditions; opposition culminated in his overthrow, illustrating how religion became entangled with elite politics in the khanate.
In the eastern domains, the Dughlat amirs elevated Tughlugh Timur as khan, conventionally dated to 1347. His enthronement signaled an accelerating east–west divergence within the Chagatai realm.
In the west (Transoxiana), Amir Qazaghan defeated Qazan Khan and installed puppet rulers (including an Ögedeid), a turning point (often dated 1347–1348) after which Chagatai khans in the west increasingly became figureheads for powerful amirs.
Tughlugh Timur temporarily reasserted Chagatai authority in Transoxiana (notably via invasion and control beginning in 1360), but after his death, power shifted rapidly to regional strongmen, setting the stage for Timurid dominance in the west.
Following the collapse of effective Chagatai control in the west after 1363, Timur (Tamerlane) emerged as the dominant power in Transoxiana, ruling through nominal Chagatai/Chinggisid legitimacy while exercising real authority himself.
Moghulistan persisted as the eastern Chagatai continuation but later fragmented; standard syntheses describe a late-15th-century breakup that produced, among others, the Yarkent and Turpan khanates as major successors in the Tarim Basin and surrounding regions.
Sultan Said Khan established the Yarkent (Yarkand) Khanate in 1514, creating a durable Chagatai-descended polity in the Tarim Basin and anchoring Chagatai dynastic legacy well beyond the 14th-century fragmentation.
In 1680, the Dzungar Khanate conquered the Yarkent Khanate, ending its independence and marking a major rupture in the remaining Chagatai-descended political order in the Tarim Basin.
The Chagatai Khanate in Central Asia: Unity, Fragmentation, and Legacy (1225–1680s)
