The Battle of Parwan was fought between sultanJelal ad-Din Mingburnu of the Khwarezmid Empire and the Mongols. The sixty thousand men of the sultan was badly equipped and tired but after a battle that lasted a day, the sultan was able to overcome his enemies. After having won, Mingburnu headed for India to seek refuge together with his army of some fifty thousand men and several thousand refugees. However, he was defeated by Chinggis Khan at the Battle of Indus.
The Battle of Indus was fought at the river Indus in today's Pakistan in the year 1221 between Jelal ad-Din Mingburnu, the sultan of the Khwarezmid Empire and his only remaining forces of five thousand, and the Mongolian horde of Chinggis Khan.
Jelal ad-Din Mingburnu was fleeing to India with his men together with thousands of refugees from Persia, following the Mongol sacking of several cities, including Bukhara and Samarkand, the latter being the Khwarezmian capital.
After having won the Battle of Parwan, near the city Ghazna (Ghazni) in eastern Persia, Mingburnu headed for India to seek refuge together with his army of some fifty thousand men and several thousand refugees.