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2022 Yangtse clash

Border clash between India and China

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Through British Raj and Plateau

Independent researchers using satellite imagery found evidence of Chinese troops, numbering about 300 according to reports, from a newly constructed border village moving up towards two Indian outposts at about 4,700 metres (15,400 ft) elevation. This provoked a clash according to the Indian government, which necessitated sending reinforcements from a forward base. Spiked clubs studded with nails and other melee weapons were used in a skirmish causing a large number of injuries on both sides. Six Indian soldiers with severe injuries were flown to Guwahati for medical treatment. The casualties on the Chinese side have not been formally disclosed. The Chinese PLA has claimed that the Indian troops transgressed the border while their troops were performing customary patrol duty on their side of the border. This did not receive corroboration from the researchers.

Yangtse, besides the larger Arunachal Pradesh region, had been the site of several such clashes in the period leading up to the latest incident. It had been recognised as one of the twelve contested border regions by the two countries in 1995. The border region is part of the Tawang district of Arunachal Pradesh, which is an important centre of Tibetan Buddhism, and has been claimed by China as part of its larger claim on Arunachal Pradesh, which it avers to be a part of South Tibet.

Sino-Indian frontier and geography

The McMahon Line

The Line of Actual Control (LAC) in the eastern sector of the border is broadly the McMahon Line agreed between British India and Tibet in 1914. Even though China regards the line as "illegal", on the grounds that Tibet was not an independent power, it agrees to abide by it as an LAC. However, the line has never been demarcated on the ground and the inadequate surveying of 1914 leaves several areas uncertain, open to dispute between the two sides. China also has an underlying claim to the entire state of Arunachal Pradesh, which it calls "South Tibet", and the claim is especially strong for the Tawang district, which was the birthplace of the 6th Dalai Lama of Tibet. The Tawang area was indeed under some form of suzerainty of Tibet at that time, but it was relinquished by Tibet in signing the agreement for the McMahon Line.

Yangtse plateau and environs

Yangtse, the region which was the site of the clash, is essentially a plateau that adjoins the LAC. It is part of a larger area called Mago-Chuna in the mountainous and thickly forested part of the Tawang district. Yangtse is bordered to the north by an LAC that is a continuous ridgeline of high mountain peaks that range in elevation from 14,000 feet (4,300 metres) to over 17,000 feet (5,200 metres). The ridgeline, with its crest reaching an elevation of over 17,500 feet (5,300 metres), roughly runs in a southwest–northeast direction to the Tulung La mountain pass, and affords observation over much of the surrounding area, including the roads leading to the all-important Sela pass, which provides India's gateway to the Tawang region. The Tsona Chu river meanders through Tsona County in southern Tibet before cutting through the Yangtse ridgeline near the Chumi Gyatse Falls, and entering Tawang. As of December 2022, Yangtse is one of the 25 contested border regions between India and China, and is mutually recognised as such by the two countries.

The Chumi Gyatse Falls, at about 250 metres (820 ft) from the LAC, form the most prominent landmark in Yangtse, and mark the juncture between the two prominent ridgelines of the area; namely, the Bum La ridgeline to its southwest, and the Tulung La ridgeline to its northeast. The McMahon line at Yangtse is coterminous with the two foregoing ridgelines. It underwent a material deviation in Yangtse in 1986, when Indian troops, in retaliation to Chinese occupation of the Wangdung pasture, moved in Yangtse and occupied the stretch to the north of the hitherto prevailing line around Chumi Gyatse Falls. The McMahon line in this area was thus altered.

The control of the Tulung La ridgeline accrues an advantage of military high ground to the Indian troops in Yangtse. Indians maintain a network of layered defences in the region, with a small detachment of forward troops maintaining a chain of six forward defensive outposts on the ridgeline. Although lightly held, these serve to establish the extent of its frontier with China. Complementing the outposts is an Indian forward base of about battalion strength, emplaced about 1.5 km (0.9 mi) south of the ridge. India also maintains a more significant military presence in valleys adjoining the Yangtse plateau, with precarious steep dirt tracks providing the only access to the higher ground. In contrast, the Chinese hold positions at lower elevations on the plateau, which places its troops at a tactical disadvantage. However, qualitative improvements to military and transport infrastructure on the Chinese side of the border accruing from its investments has greatly enhanced its capacity to mobilize troops.

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