to infiltrate Indian Kashmir using airborne troops from the Pakistan Army (Special Service Group) and Pakistan Air Force (Special Service Wing). During nights in August 1965, airborne troops parachuted into Indian Kashmir whilst ground assault began by Pakistan Army's troops. The airborne troops managed to occupy much of Indian-administered Kashmir and were only from Srinagar, but this was the closest Pakistani troops ever got to capturing the city. In September 1965, India launched a counter-attack and the airborne troops were pushed back to what is today Azad Kashmir. The operation failed brutally, and Indian Armed Forces attacked West Pakistan with full force. The Soviet Union intervened in the conflict in September 1965 (for fear of escalation), and the month–long war ended with no permanent territorial changes. West Pakistan and India signed the Tashkent Declaration in January 1966, but the ceasefire was criticised both in India and Pakistan, and public resentment against each other grew. In West Pakistan, Ayub Khan deposed Bhutto as his Foreign minister, and Vice-Admiral Khan blamed Bhutto for the operation's failure. As an aftermath, Bhutto tapped into an anti-Ayub Khan movement and kicked off a storm of civil disobedience. Protests and spontaneous demonstrations broke out around the country, and Ayub Khan lost the control. In 1967, another martial law was imposed by another Army Commander-in-Chief, General Yahya Khan, who designated himself as the Chief Martial Law Administrator. People's Republic of China West Pakistan had positive relations with the People's Republic of China, with whom it shared a small northern border. In 1950, Pakistan was among the first countries to end official diplomatic relations with the Taiwanese Republic of China and recognise the PRC. After that, both countries maintained an extremely close and supportive relationship. The PRC provided economic, military and technical assistance to Pakistan during the Cold War, and the two countries considered each other to be close strategic allies. Soviet Union Relations varied from cool to extremely strained between West Pakistan and the Soviet Union. This was during the Cold War, and Pakistan's close ties with the United States came at the expense of relations with the Soviets. Soviet-Pakistan relations were further eroded during the 1960 U-2 incident, when the Soviets shot down a US spyplane; Army Chief-of-Staff Ayub Khan had given the US permission to fly out of Peshawar Air Station on reconnaissance and covert surveillance missions over the Soviet Union. The USSR backed India