“Who decisively defeated the Mongols in India?”

"Sultan Alauddin Khilji a prominent ruler of the Delhi Sultanate decisively repelled Mongol invasions in India during the late 13th and early 14th centuries. His military strategies including fortification of the northwest frontier and swift campaigns ensured India’s defense against repeated Mongol incursions. Alauddin’s victories particularly at battles like Kili (1299) solidified his reputation as a formidable leader. His reign marked a significant era in Indian history showcasing effective governance and military prowess that protected the subcontinent from external threats."