Battle of Herat (1270)

Battle of Herat (1270)
Part of the Kaidu–Kublai war

Division of the Mongol Empire, c. 1300, with the Chagatai Khanate in gray and Ilkhanate in purple.
Date22 July 1270
Location
Result Ilkhanate victory
Belligerents
Ilkhanate Chagatai Khanate
Commanders and leaders
Abaqa Khan
Yoshmut
Arghun Aqa
Samaghar
Ghiyas-ud-din Baraq (WIA)
Marghaul 
Strength
50,000–100,000 90,000–150,000
Casualties and losses
5,000 killed 40,000 killed

The Battle of Herat was fought between the Ilkhanid forces of Abaqa Khan and the invading Chagatai forces of Ghiyas-ud-din Baraq on 22 July 1270. The battle marked the climax of a broader power struggle within the fractured Mongol Empire, as former allies and competing ulus contended for supremacy in the aftermath of the Toluid Revolution and the succession crisis. Despite initial successes for the Chagatai forces in Khorasan, they were met with a crushing defeat at Herat by Abaqa Khan, who then retaliated by invading Bukhara but later retreated, securing the Ilkhanid-Chagatai border.