Battle of Thanna (1420) In 1420, a civil war erupted between
Sultan of Kashmir,
Ali Shah and the claimant to throne Shahi Khan. Ali Shah defeated Shahi Khan with the help of Bhim Dev, Raja of Jammu and his father-in-law, and expelled him from Kashmir. Shahi Khan went to Sialkot to ask Jasrat for help, who decided to support him. Hearing this, Ali Shah marched with his army to Sialkot. The two sides met at
Thanna and in the ensuing battle, Ali Shah's army was routed and he was himself killed by Jasrat. This battle greatly increased the prestige and wealth of Jasrat. When the allied army reached
Srinagar, dispute occurred between Shahi Khan and Jasrat as the latter intended to annex Kashmir into his own kingdom. Ultimately, both reached a friendship treaty according to which Shahi Khan would supply money and men to Jasrat for his conquest of Punjab. With the help of Jasrat, Shahi Khan was enthroned as sultan
Zain-ul-Abidin.
Invasions of Delhi sultanate In 1414, the Tughlaq dynasty was replaced by dynasty of
Khizr Khan. However, he could not stop the decline of the sultanate. Jasrat aimed to conquer Delhi, and after death of Khizr Khan in May 1421, crossed the
Ravi River. He successively conquered
Ludhiana and
Jalandhar and proceeded to besiege
Sirhind. In October 1421, Sultan
Mubarak Shah marched against Jasrat, who after a skirmish at
Rupar, retreated to his kingdom. Due to his old enmity with Jasrat, Raja of Jammu Bhim Dev greatly aided Mubarak Shah in his campaign. Bhim Dev also destroyed Jasrat's stronghold of Tilhar at
Rajouri in January 1422. In May 1422, Jasrat again invaded the sultanate and this time besieged Lahore, but was unable to take it by storm. With the help of Raja Bhim, Delhi army invaded his domains and Jasrat again retreated in September 1422.
Invasion of Jammu (1423) Due to the support Bhim Dev had been providing to the Delhi sultanate, Jasrat set out from his stronghold of Rajouri and invaded Jammu in April 1423 and ravaged the region. Bhim Dev was killed in a battle and Jasrat married one of his daughters, as well as captured a large amount of wealth and arms from him. Following invasion of Jammu, Manik Dev was appointed as its new Raja. After the conquest of Jammu, Jasrat raised a contingent of
Mongol mercenaries and sacked Dipalpur and plundered suburbs of Lahore, after which he returned with bounty to his domains as usual. In August 1428, Jasrat again marched against Delhi sultanate. He besieged
Kalanor, and completely sacked Jalandhar. However, he was defeated by governor of Lahore Sikander Tohfa at the bank of river
Beas near
Kangra and retreated to Tilhar, leaving the war spoils back. This failure disappointed Jasrat, who realised that he lacked sufficient power to conquer Delhi. Thus, he started negotiations with Shaikh Ali, the
Timurid governor of
Kabul. However, when Shaikh Ali ultimately invaded Punjab in 1430, Jasrat did not aid him, although many other Khokhar leaders, including his nephew Khajeka had joined Shaikh Ali. After Shaikh Ali was defeated by Delhi armies, Jasrat again invaded the sultanate in 1431. He conquered Jalandhar and defeated Sikander Tohfa, taking him away as captive. Sikander was released after paying heavy ransom. Jasrat next besieged Lahore for several months during 1431–32. By this time, the influence of Delhi Sultanate had heavily diminished in Punjab, and the region was in the hands of rebels. By February 1432, Mubarak Shah moved with a large army against Jasrat and other rebels. Jasrat raised the siege of Lahore in July and left for Tilhar after making Jalandhar part of his domains. Later, when the governor of Lahore Allahdad Kaka invaded Jasrat's territories in 1432 to re-gain charge of Jalandhar he was defeated at
Bajwara and fled.
Battles with Afghans In 1431, Sikander Tohfa allied with Jasrat against the Afghans who had firmly based themselves at Sirhind. Jasrat and Sikander easily captured Sirhind, but Afghans had already left and moved to the hills. There many of them, including
Bahlol Khan Lodi's relatives, were massacred by both and others were made captives. After 1436, Jasrat fought battles against Bahlol Khan, who had re-established himself at Sirhind by bringing all Afghans under his banner. The alliance of Jasrat and Sikander saw success as Bahlol Khan was compelled to retreat towards the
Siwalik foothills. But when
Muhammad Shah left Delhi to invade Jasrat's domains in 1441 and appointed Bahlol Khan as governor of Sirhind to combat him, he made peace with Bahlol and advised him to capture the throne of Delhi for himself. Unlike Jasrat, who was viewed as an outsider by Delhi nobles, Bahlol was a part of the nobility and had better prospect of gaining the throne of Delhi. In return of his support, Bahlol ceded the region between
Chenab and Jhelum (
Chaj Doab) to Jasrat and agreed to not interfere in his territories. Sultan Zain ul-Abidin acted as witness to the peace treaty between both. ==Death==