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