The Treaty of Lahore of 9 March 1846, was a peace treaty marking the end of the First Anglo-Sikh War. The Treaty was concluded, for the British, by the Governor-General Sir Henry Hardinge and two officers of the East India Company and, for the Sikhs, by the seven-year-old Maharaja Duleep Singh Bahadur and seven members of the Lahore Durbar acting on his behalf.
The terms of the Treaty were punitive. Sikh territory was reduced to a fraction of its former size, losing Jammu, Kashmir, Hazara, the territory to the south of the river Sutlej and the forts and territory in the Jalandhar Doab between the rivers Sutlej and Beas. In addition, controls were placed on the size of the Lahore army and thirty-six field guns were confiscated. The control of the rivers Sutlej and Beas and part of the Indus passed to the British, with the proviso that this was not to interfere with the passage of passenger boats owned by the Lahore Government. Also, provision was made for the separate sale of all the hilly regions between River Beas and Indus, including Kashmir, by the East India Company at a later date to Gulab Singh, the Raja of Jammu.
Maharaja Ranjit Singh Sukerchakia had made Lahore the capital of the Sikh Empire of the Punjab, which he built up between 1799 and his death in 1839. After his death, factions and assassinations destroyed the unity of the State, causing alarm to the British because it weakened the buffer against the perceived threat of invasion from the north. Provocative acts by both the British and the Sikhs escalated tension and, on 13 December 1845, Hardinge issued a proclamation declaring war on the Sikhs.
During the First Anglo-Sikh War, the British came close to defeat at the Battle of Ferozeshah, but were eventually victorious. After the defeat of the Sikhs at the Battle of Sobraon, the British marched unopposed into Lahore on 20 February 1846.