Question

why is treaty of Amritsar called the sale deed of Kashmir ?

Answer 1

By the Treaty of Lahore the British claimed all the territories between the Beas and the Indus in lieu of the remaining one crore rupees. ... Subsequently “Treaty of Amritsar” notoriously known as “Sale deed of Kashmir” was concluded between Raja Gulab Singh and the British Government on March 16, 1846 at Amritsar

Answer 2

From December 1845, British and Sikhs forces fought in Punjab. In Gulab Singh’s self-imposed strategic absence, Sikhs forces were hindered by some poor or half-hearted generalship. Conversely, some determined fighting by the British and Indian armies ensured that they won the first Anglo-Sikh war, after which the British obtained some significant financial and territorial spoils. Many British (hypocritically) considered the non-participant, Gulab Singh, to be devious, or a detested villain, or ‘the worst native [they had] ever come into contact with, a bad King, a miser, and a liar’.