Solution:Genghis Khan was a Mongolian who played a significant role in Mongolian imperial expansion. The original name of Genghis Khan was Temujin (or Temuchin).
Genghis Khan made several incursions into the Indian subcontinent when he chased the Jalal al Din, the last ruler of the Khwarezmian Empire, all the way to the Indus river in 1221. The Khwarezmian Empire was destroyed by the Mongols the year before and Genghis Khan had ordered anyone member of the ruling family to be tracked down and killed.
In their pursuit of Jalal, the Mongols sacked several cities in the Punjab region but their incursions were limited towards the western banks of the Sindh river at the time.
Following Genghis Khan's death in 1227, the Mongol empire fractured into a civil war between his sons. Large-scale invasions would decrease following this period which gave enough time for the Delhi Sultanate to shore up its defences.