1965 War:

Pak still desired for the accession of Kashmir, even after its debacle by Indian troops in 1947. In April 1965, Pakistan launched armed incursion in the Rann of Kutch area of Gujarat, later it launched bigger offensive, as part of “Operation Gibraltar”, in J&K in August and September in 1965. Pakistan thought that this time the local population would support the cause of Pakistan, but the planfailed to convince the local people and Pak couldn't get the local support. Meanwhile, in order to ease the pressure from Kashmir front, the then PM Shastri ordered Indian troops to launch counter offensive on the Punjab border. This war again won by India, and the hostilities came to an end with UN intervention.

after Soviet Union mediated negotiations Prime Minister Shastri and General Ayub khan of Pakistan, signed the Tashkent Agreement in January 1966. Although India won the war, this war added to India’s economic difficulties.