Battle of the Altai Mountains

Battle of Altai Mountains
Part of the Han–Xiongnu War
Date June 89 AD Location Region near the Altai Mountains Result Han victory Collapse of Northern Xiongnu power North-westward migration of the Northern Xiongnu
Belligerents
Northern Xiongnu	Han dynasty Southern Xiongnu
Commanders and leaders
Northern Shanyu †	Dou Xian[1] Deng Hong Tuntuhe Anguo
Strength
200,000	c. 18,000[1] 8,000 Han Chinese regulars[1] 10,000 Qiang
Casualties and losses
Entire Xiongnu's army destroyed (with more than 200,000 prisoners)	3,400+

The Battle of Altai Mountains (Chinese: 稽落山之戰), was a major expedition launched against the Northern Xiongnu by the Han dynasty in June 89 AD. The battle was a success for the Han under Dou Xian (d. AD 92).^[2][3][4]

In June 89 AD, the Han dispatched a force which promptly advanced from Jilu, Manyi, and Guyang in three great columns that included their allies, specifically the main army of the Southern Xiongnu.^[2][3][4] The force of General Dou Xian advanced towards the Northern Chanyu into the Altai Mountains.^[5] A large detachment then moved to the northwest, and in the major battle of the campaign they defeated the Northern Chanyu at the Altai Mountains and pursued them westwards.^[2][3][4] The Han forces killed 13,000 Xiongnu troops and accepted the surrender of 200,000 Xiongnu from 81 tribes.^[5]

Dou Xian brought the main body of his troops in triumphal progress north to the Khangai Mountains, west of present-day Kharkhorin. There he carved the cliff Inscriptions of Yanran,^[6] composed by his client, the historian Ban Gu, which celebrated the achievement of the battle.^[2][3][4] This inscription was identified in Dundgovi Province by scholars from Mongolia and China in August 2017.