Western Liao was the state founded in Central Asia by the Liao imperial clansman Yelü Dashi after his westward migration. Its rulers continued to use Liao as the state name; because it lay west of the former Liao realm, it is known as Western Liao, while Islamic sources commonly call it Qara Khitai. The state was governed by a Khitan ruling group and exercised sovereignty over multiethnic cities and steppe regions of Transoxiana, Semirechye, and western Xinjiang through tributary arrangements…
1124 CE–1218 CECapital · Balasagun
ERA OVERVIEW
Western Liao was the state founded in Central Asia by the Liao imperial clansman Yelü Dashi after his westward migration. Its rulers continued to use Liao as the state name; because it lay west of the former Liao realm, it is known as Western Liao, while Islamic sources commonly call it Qara Khitai. The state was governed by a Khitan ruling group and exercised sovereignty over multiethnic cities and steppe regions of Transoxiana, Semirechye, and western Xinjiang through tributary arrangements and local intermediaries. Its institutions preserved elements of Liao traditions while adapting to the Islamic urban societies of Central Asia.
Time span1124 CE–1218 CE
CapitalBalasagun
ERA TIMELINE
Yelü Dashi led followers westward; theOpen
Yelü Dashi led followers westward; the Western Liao regime began.
Further westward expansion toward SemiOpen
Further westward expansion toward Semirechye and Central Asia.
Yelü Dashi assumed the imperial title Open
Yelü Dashi assumed the imperial title and established a stable ruling center.
Western Liao gained control of the BalOpen
Western Liao gained control of the Balasagun area.
Victory over the Seljuk coalition at tOpen
Victory over the Seljuk coalition at the Battle of Qatwan.
Yelü Dashi died and Xiao Tabuyan becamOpen
Yelü Dashi died and Xiao Tabuyan became regent.
Yelü Pusuwan began ruling as regent.Open
Yelü Pusuwan began ruling as regent.
Yelü Zhilugu ascended the throne.Open
Yelü Zhilugu ascended the throne.
Kuchlug seized effective power.Open
Kuchlug seized effective power.
Mongol forces defeated Kuchlug and WesOpen
Mongol forces defeated Kuchlug and Western Liao came to an end.
FULL ENTRY
Historical Development
Around the fall of Liao, Yelü Dashi led followers away from the Mongolian steppe and expanded westward. Around 1130, the third year of Yanqing, he continued his western campaigns, subsequently controlling the Semirechye region and establishing a capital at Balasagun. In 1141, the tenth year of Kangguo, Western Liao defeated a Seljuk-led coalition at the Battle of Qatwan and established supremacy in Transoxiana. After Yelü Dashi died, Xiao Tabuyan ruled as regent, followed by Yelü Yilie, Yelü Pusuwan, and Yelü Zhilugu. In the later period, the rise of Khwarazm weakened tributary relationships. In 1211, the Naiman prince Kuchlug seized effective power. In 1218, the Mongol commander Jebe entered Western Liao territory and Kuchlug was defeated and killed.
Politics and Institutions
Western Liao rulers used Chinese-style era names and retained parts of Liao court ritual. In many Central Asian tributary states, they left existing rulers, officials, religions, and tax systems in place, maintaining overlordship through representatives and tribute. Gurkhan was a common royal title. This layered indirect system reduced administrative costs but made central control over strong subordinate powers such as Khwarazm relatively fragile.
Military and Diplomacy
The army combined a Khitan core with Turkic and other local troops and was effective in steppe mobile warfare. The victory at Qatwan made Western Liao a major twelfth-century Central Asian power. In its final period, expansion by Khwarazm, the seizure of power by the exiled Naiman group under Kuchlug, and Mongol westward expansion progressively destroyed the regime's military and tributary systems.
Economy and Commerce
Western Liao controlled steppe, oasis, and urban networks along the central Silk Road. Agriculture, handicrafts, and long-distance commerce in Transoxiana provided tax revenues. The rulers generally did not compel subjects to change their religion or social institutions, helping maintain trade and urban life. Coins, documents, and multilingual sources reflect the combination of Khitan political traditions and Central Asian economic practices.
Culture and Society
The realm included Buddhists, Muslims, Church of the East Christians, and followers of various local traditions. The rulers maintained relative religious tolerance. Chinese-style era names, Khitan political titles, and Islamic memories of Qara Khitai coexisted. The name “Khitai/Khitan,” transmitted across Central Asia, became a long-lasting source for words meaning China in several languages.
> This section explains the rulers' positions in the regime's evolution; full biographies are carried by the corresponding person entities.
Historical Assessment and Legacy
Western Liao carried Liao political traditions into Central Asia and maintained a layered system of rule across steppe and oasis cities. It altered the balance among the Seljuks, Khwarazm, and other Central Asian states and helped make “Khitan” an important Eurasian name for China. Research on Western Liao requires combining Chinese, Persian, Arabic, and numismatic evidence.