The Making of an ‘All Weather Friendship’ Pakistan,China and the History of a Border Agreement: 1949–1963

China and Pakistan share what is widely known as an ‘all weather friendship’. The historical roots of this friendship can be traced to 1963, when the two countries entered into a border agreement that divided territory in Pakistan-administered Kashmir. Since then, China has provided missile and nuclear technology to Pakistan. It has limited the potential for escalation in the time of war between India and Pakistan and is the largest economic investor in Pakistan. The benefits of this friendship for Pakistan are clear. Yet, there is little detail on what led to the making of the ‘all weather friendship’. This article provides a detailed account of Sino–Pakistani relations between 1949 and 1963. It argues that whilst the 1963 agreement led to a turning point, the Pakistani establishment – military and civilian – sought to engage China since 1949. They did so to create strategic options for themselves in the event that the US and the UK – Pakistan's main allies following independence – limited or worse, ended their support for Pakistan in its troubled relations with India. This article is based on primary sources available in the US, Britain, as well as recently declassified and hitherto unused papers in India.