Key Facts
- Date
- April 1221 (Muharram 618 AH)
- Mongol force size
- 10,000–15,000 men
- Estimated casualties (medieval sources)
- Over 1,747,000
- Estimated casualties (modern scholars)
- 100,000–200,000
- Mongol commander
- Tolui Khan, son of Genghis Khan
Strategic Narrative Overview
In spring 1221, Tolui Khan led a Mongol army estimated at 10,000 to 15,000 soldiers to besiege Nishapur. The city's defences were breached after sustained assault. Once inside, Mongol forces conducted a systematic destruction of the city. Persian chronicler Ata-Malik Juvayni recorded that not even cats and dogs were spared, and the site was subsequently sown with barley to erase any trace of the settlement.
01 / The Origins
Nishapur was one of Khorasan's foremost cities, situated on the Silk Road and renowned for its markets, pottery, textiles, and turquoise production. By the early 13th century it was part of the Khwarazmian Empire. The Mongol invasion of Khorasan under Genghis Khan brought Mongol forces into the region, and an earlier engagement at Nishapur resulted in the death of Taghaqchar, Genghis Khan's son-in-law, setting the stage for retribution.
03 / The Outcome
The fall of Nishapur ended in a near-total massacre of its population and the physical demolition of the city. Medieval sources claim over 1.7 million killed, while modern estimates range from 100,000 to 200,000 dead. The destruction was framed explicitly as vengeance for Taghaqchar's death. Nishapur, once a thriving cultural and commercial hub, was effectively wiped out, dealing a lasting blow to Khorasan's urban and intellectual life.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Tolui Khan.
Side B
1 belligerent
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.