During Alauddin 's reign , the Mongols invaded India again : compared to the previous invasions , these were large - scale invasions .
Alauddin 's predecessor Jalaluddin also faced a Mongol invasion , and managed to halt it .
During Alauddin 's reign , the Mongol invaded India again : compared to the previous invasions , these were large - scale invasions .
Alauddin 's predecessor Jalaluddin also faced a Mongol invasion , and managed to halt it .