麦克马洪线
In June 1962, Indian forces had established an outpost at Dhola, in the Namkha Chu valley bordering the southern slopes of Thag La Ridge, overlooking the village of Le in Tibet. Based on the treaty map of the 1914 Simla Convention, the McMahon Line lay at 27°45'40"N. However, Dhola post lay about 3.5 mile (6 km) north of the McMahon Line The Indian government maintained that the "intention" of the McMahon Line was to set the border along the highest ridges, and that the international border fell on the highest ridges of Thag La, about north of the line drawn by Henry McMahon on the treaty map. Brigadier John Dalvi would later write of this claim: "The Chinese had raised a dispute about the exact alignment of the McMahon Line in the Thag La Ridge area. Therefore the Thag La-Dhola area was not strictly territory that 'we should have been convinced was ours' as directed by the Prime Minister, Mr. Nehru, and someone is guilty of exceeding the limits prescribed by him."