Trans-Karakoram Tract
The eastern region of the erstwhile princely state of Kashmir has also been beset with a boundary dispute. In the late 19th- and early 20th centuries, although some boundary agreements were signed between Great Britain, Afghanistan and Russia over the northern borders of Kashmir, China never accepted these agreements, and the official Chinese position did not change with the communist revolution in 1949. By the mid-1950s the Chinese army had entered the north-east portion of Ladakh.: "By 1956–57 they had completed a military road through the Aksai Chin area to provide better communication between Xinjiang and western Tibet. India's belated discovery of this road led to border clashes between the two countries that culminated in the Sino-Indian war of October 1962." China has occupied Aksai Chin since 1962 and, in addition, an adjoining region, the Trans-Karakoram Tract was ceded by Pakistan to China in 1965.