Udaya-simha (IAST: Udayasiṃha, r. c. 1204-1257 CE) was an Indian king belonging to the Chahamana dynasty, who ruled the area around Javalipura (present-day Jalore in Rajasthan).
Taking advantage of this, three northern Chaulukya feudatories in the Marwar region formed an alliance and rebelled against the imperial rule.
[5] According to the Sundha Hill inscription, he ruled Javalipura (Jalor), Naddula (Nadol), Mandavyapura (Mandore), Vagabhatameru (Juna Barmer), Surachanda (Surachand), Ramasainya (Ramseen), Srimala (Bhinmal), and Satyapura (Sanchore), among other places.
[6] Historian Dasharatha Sharma theorizes that some of these places, which were earlier a part of the Chaulukya empire, came under Chahamana control while Lavanaprasada was busy fighting the Yadavas.
However, A. K. Srivastava does not find this identification convincing, as Sindhuraja of Lata had been killed by the Yadava king Simhana.
[8] Udayasimha appears to have become a tributary to the Delhi Sultanate at some point, but refused to pay the tribute, leading to a war sometime during 1211-1216 CE.
Firishta states that the Delhi Sultan Iltutmish marched to Jalore when Udayasimha discontinued the tribute payments.
Lavanaprasada's son Viradhavala and his minister Vastupala organized a confederacy of Hindu rulers, forcing the Delhi Sultan to retreat without a fight.
The northern rebel feudatories (including Udayasimha) initially planned to side with the Turushkas, but Viradhavala convinced them to ally with the Chaulukyas.
The 17th century chronicler Muhnot Nainsi states that "Sultan Jalal-ud-Din" attacked Jalore in 1241 CE, but was defeated and forced to retreat.
The Jain legend in the Puratana-Prabandha-Sangraha collection gives a similar account, but states that the attack was led by a general named Malik Ambar.
The Turkic army drank quenched its thirst at Sundara lake, and halted at the Sirana village.
When the Delhi army damaged the fort using explosives, Udayasimha sent Rajaputra Bapada to negotiate a peace treaty with the invaders.