The Mongols catch up with Jalal ad-Din…
April 1221 CE
The Mongols catch up with Jalal ad-Din in spring 122 at the banks of the Indus River, however.
The forty thousand-man Mongol column faces thirty thousand Muslims, organized with their backs to the river, their right flank protected by its bend, their left flank guarded by a mountain ridge.
The Muslim line charges: first the right flank, then the center.
Genghis Khan, perceiving the weakness on the Muslim left flank, sends his mountain-experienced cavalry over the ridge to attack it, envelops the Muslims and slaughters their forces together with thousands of refugees.
When the sultan realizes he is doomed, he and his closest followers cross the Indus River at Hund.
Only a few of the refugees and probably none of the soldiers make it to the other side alive.
Genghis Khan, declining to pursue him further, returns to Persia in order to consolidate Mongol control of Khorasan.
Jalal seeks asylum in the Sultanate of Delhi, but …