McMahon Line
In subsequent years, China continued to claim the pre-McMahon border as the border between Tibet and India, while British India gradually established effective control over Monyul south of the McMahon line. Following the independence of India and a change of government in China, the dispute became a major issue in relations between China and India. The McMahon Line was the effective line of control in this period, though the border was somewhat porous. In 1962, skirmishes along the disputed border escalated into the Sino-Indian War. During the war, China took effective control of the entire Monyul area south of the McMahon Line as well as other surrounding areas. However, the war ended with China's voluntary withdrawal north of the McMahon Line. Negotiations on the dispute remain active.