1965-1966: In early 1965, India and Pakistan engage in a series of clashes in the Rann of Kutch which ends in a ceasefire on 30 June under British mediation.
In May 1965, Sheikh Abdullah is arrested on his return to India from Mecca on account of his meeting with the Chinese Prime Minister at Algiers; Angry protests occur in Kashmir Valley; The Plebiscite Front initiates a satyagraha for Abdullah's release and many workers are arrested.
Pakistan takes advantage of the discontent in the Valley and sends in a few thousand armed Pakistani infiltrators across the cease-fire line in August and incidents of violence increase in Kashmir Valley; Code-named "Operation Gibraltar", one can see evidence of official Pakistani policy at work here; Indian and Pakistani forces cross the cease-fire line and later the international border in September. A full Indo-Pakistani war breaks out which ends in a ceasefire on 23 September. In January 1966, Tashkent
Declaration is signed by both countries agreeing to revert to pre-1965 position, under Russian mediation.
Pakistan supported guerrilla groups in Kashmir increase their activities after the
ceasefire. Kashmiri nationalists Amanullah Khan and Maqbool Butt form another Plebiscite Front with an armed wing called the Jammu and Kashmir National Liberation Front(NLF) in Azad Kashmir, with the objective of freeing Kashmir from Indian occupation; Butt crosses into the Valley in June 1966 and engages in clashes with the Indian army; He is arrested and sentenced to death in 1968 but escapes to Azad Kashmir with help from the local people;
Balraj Puri, Kashmir: Towards Insurgency, New Delhi 1993, p.31-2
Alastair Lamb, Kashmir A Disputed Legacy 1846-1990, Roxford 1991, pp.255-271
Victoria Schofield, Kashmir in Conflict, New York 2000, pp.114-6.