In the last days of 1948, a ceasefire was agreed under UN auspices; however, since the plebiscite demanded by the UN was never conducted, relations between India and Pakistan soured, and eventually led to three more wars over Kashmir in 1965, 1971 and 1999. India has control of about half the area of the former princely state of Jammu and Kashmir; Pakistan controls a third of the region, governing it as Gilgit–Baltistan and Azad Kashmir. According to Encyclopædia Britannica, "Although there was a clear Muslim majority in Kashmir before the 1947 partition and its economic, cultural, and geographic contiguity with the Muslim-majority area of the Punjab (in Pakistan) could be convincingly demonstrated, the political developments during and after the partition resulted in a division of the region. Pakistan was left with territory that, although basically Muslim in character, was thinly populated, relatively inaccessible, and economically underdeveloped. The largest Muslim group, situated in the Valley of Kashmir and estimated to number more than half the population of the entire region, lay in Indian-administered territory, with its former outlets via the Jhelum valley route blocked." The UN Security Council on 20 January 1948 passed Resolution 39 establishing a special commission to investigate the conflict. Subsequent to the commission's recommendation the Security Council, ordered in its Resolution 47, passed on 21 April 1948 that the invading Pakistani army retreat from Jammu & Kashmir and that the accession of Kashmir to either India or Pakistan be determined in accordance with a plebiscite to be supervised by the UN. In a string of subsequent resolutions the Security Council took notice of the continuing failure by India to hold the plebiscite. However, no punitive action against India could be taken by the Security Council because its resolution, requiring India to hold a Plebiscite, was non-binding. Moreover, the Pakistani army never left the part of the Kashmir, they managed to keep occupied at the end of the 1947 war. They were required by the Security Council resolution 47 to remove all armed personnels from the Azad Kashmir before holding the plebiscite. 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.