Decline of the Khwarazmian Dynasty

Timeline

1. 1219Samarkand · UzbekistanAfter the Mongol army crossed the Syr Darya, Khwarazm Shah Ala al-Din Muhammad abandoned his capital Samarkand, fleeing west toward the Caspian with his family and part of his treasure, leaving garrisons everywhere without unified command.
2. 1219–1220Khurasan · KhurasanAfter the shah's flight, major towns such as Otrar, Bukhara, and Samarkand fought on their own; local governors and princes vied for power, and the empire's administrative and military systems disintegrated, unable to mount effective resistance.
3. 1220–1221Indus River basin · Indus River basinAfter Muhammad died on a small Caspian island, Khwarazm ceased to exist as a unified polity; his son Jalal al-Din organized guerrilla resistance around the Indian frontier but could not rebuild the empire.