Prithviraj and his army were sleeping and was able to win this war. Hammir Dev Chauhan Prithviraj Chauhan's  descendant,  Hammir Dev Chauhan  ruled Ranasthambpur ( Ranthambore ). Ranthambore fort of Hada Chauhan dynasty Jalore  was ruled by another branch of  Chauhans , the  Songaras .  Ala ud din Khilji  usurped  Delhi