The Sino-Indian border is generally divided into three sectors namely: (i) the Western sector, (ii) the Middle sector, and (iii) the Eastern sector.

(i) The Western Sector:

This 2,152 km long sector of the Sino-Indian border separates Jammu and Kashmir State of India from the Sinkiang province of China.

The frontier between Sinkiang and Pakistan occupied Kashmir (PoK) is about 480 km long. The rest is boundary between Ladakh and Tibet.

The boundary in the western sector runs along the Muztagh Ata Range and the Aghil Mountain across the Karakoram Pass via Quara Tagh pass and along the main Kunlun Range to a point east of 80°E longitude and 40 km north of Hajit Langer.

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It forms a physical boundary between Gilgit area and Sinkiang following the main Karakoram watershed separating the streams flowing into the Indus basin from those flowing into the Tarin basin.

Farther south-east the boundary runs along the watershed across Lanak La, Kone La and Kepsang La, then follows the Chemesang River across Pergyon Lake and the Kailash Range. Here the boundary constitutes the watershed between the Indus system in India and the Khotan system in China.

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The western sector boundary is the outcome of the British policy towards the state of Jammu and Kashmir. These boundaries were defined by the treaties of 1665 and 1686 (known as Ladakh-Tibet agreements) and were confirmed by 1842 Dogra-Ladakh agreement among Kashmir, Tibet and China.

However, this boundary was never delimited precisely on maps and has led to several boundary disputes between China and India. The Chinese claim rests mainly on ethnic grounds, and on the assertion that the wastelands of the Aksai Chin in disputed territory were always linked more with Tibet and Sinkiang.

The Chinese claim that Aksai Chin is just an extension of Tibet with regard to language, religion and culture. But in Chinese documentation regarding the actual occupation of the area by Tibet in inconclusive.

The Indians, on the other hand, claim that the area has been historically administered by the state of Jammu and Kashmir since 1849, and that the Indo-Tibet Treaties of 1665, 1684 and 1842 confirmed the boundary between Tibet and Ladakh.

China claims the Aksai Chin district, the Changmo valley, Pangong Tso and the Sponggar Tso area of north-east Ladakh as well as a strip of about 5,000 sq km down the entire length of eastern Ladakh. China also claims a part of Huza-Gilgit area in North Kashmir (ceded to it in 1963 by Pakistan), although the whole territory has been effectively under the British sovereignty since 1895.

Since 1954, the Chinese have repeatedly violated the international border between India and China and penetrated deep into the Indian Territory in the western sector. China renewed aggression in 1959 and the Line of Actual Control (LoAC) become of series of positions occupied by the Chinese forces rather than a well defined border between the two countries.

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In 1962, China waged a full scale war and its forces intruded far deeper into the Indian Territory. Currently the Chinese occupation line runs 16 to 240 km west of traditional line. China is in actual possession of about 54,000 sq km of the Indian Territory of which 37,555 sq km is in Ladakh area alone.

(ii) The Middle Sector:

The middle sector boundary between China and India is 625 km long and runs along the watershed from Ladakh to Nepal. Two Indian states of Himachal Pradesh and Uttaranchal touch this border. The boundary of Himachal Pradesh follows the water parting between the Spiti and Para Chu rivers and continues along the watershed between the eastern and western tributaries of the Satluj.

The Uttaranchal boundary is demarcated by the watershed between the Satluj on one hand and the Kali, the Alaknanda, and the Bhagirathi on the other. This boundary crosses the Satluj near the Shipki La on the Himachal-Tibet border.

Thereafter, it runs along the watershed passes of Mana, Niti, Kungri-Bingri, Dharma and Lipu Ladakh. It finally joins trijunction of China, India and Nepal. This part of the border was approved by the Tibetan and the British governments under the 1890 and 1919 treaties. Although there are not much serious territorial problems between the two countries, the Chinese lay claim on nearly 2,000 sq km area in this sector.

(iii) The Eastern Sector:

The 1,140 km long boundary between India and China runs from the eastern limit of Bhutan to a point near Talu-Pass at the trijunction of India, Tibet and Myanmar. This line is usually referred to as the Me Mahon Line after Henry Me Mahon, a British representative who signed the 1913-14 Shimla Convention. This line normally runs along the crest of the Himalayas between Bhutan and Myanmar.

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India has stressed that the Me Mahon Line is the international boundary between Tibet and India as was agreed to between the governments of India, China and Tibet. On the other hand China considers the Me Mahon line as illegal and unacceptable, claiming that Tibet had no right to sign the 1913-14 convention held in Shimla which delineated the Me Mahon Line on the map.

India challenges such a position, maintaining that Tibet was independent and in fact concluded several independent treaties which were considered valid by all parties, and were in operation for decades.

China declined the validity of the Me Mahon Line as an international boundary and laid claims to areas south of this line up to the foot of the Himalayan range in the Brahmaputra valley. The whole of Arunachal Pradesh, measuring over 88 thousand sq km has been claimed by China as the Chinese territory. This area has been administered by India since 1947.

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Chinese government never formally questioned the validity of 1913-14 Shimla convention until 1959. India has been striking at the two crucial points. First, Britain and India had been exercising jurisdiction over the area since 1914 and 1947 respectively and second China never disputed the Indian control over the area until 1959.

Even in 1956 when the Chinese attention was drawn to certain maps drawn by China which showed these areas to be parts of China, the Chinese government promised to look into the ‘cartographic errors’ in their maps.

China’s relations with India started taking a bad turn in 1950s when China started consolidating its position in Tibet and then in Ladakh. By 1956, China started intensifying its intrusions into the Indian Territory. India wishfully hoped that the insurmountable barrier of the Himalayas would prevent Chinese to attack Indian Territory.

Indian apprehensions grew in 1956 when China built a road through Ladakh linking West Tibet with Sinkiang and quickly moved into Aksai Chin and eastern Ladakh. China also moved its forces into the North-East Frontier Agency (NEFA), the present Arunachal Pradesh.

Reported small-scale armed clashes between 1959 and 1962 escalated into a full-scale war in October, 1962 when China launched a major offensive in Ladakh in the western sector and NEFA in the eastern sector. Indian armed forces were not well trained to fight a modern war in a rough and rugged mountainous terrain. They were outnumbered and outgunned by the Chinese forces.

Following lessons have been learnt from Chinese aggression over India:

(i) The myth that the Himalayas were an effective defense barrier was exploded.

(ii) India’s naive confidence in China’s friendliness had dulled its perception regarding effective security measures in the Indo-China borderlands.

(iii) The prompt and positive response of western countries in rushing military supplies to the war zone helped improve the image of the West in Indian eyes.

(iv) India realised that posture of “non-alignment” was no substitute for defense preparedness.

Surprisingly, Chinese forces pulled back without annexing the disputed territory in the eastern sector. In the western sector, however, they did not pull out of most of Aksai Chin. Perhaps they did so due to the fear that their advance troops would have been cut off from supply bases in Tibet in winter of 1962 when the high passes in the Himalayas would have been closed by snow. The Chinese justified their withdrawal by stating that they had no further territorial ambitions.

The primary aim of Chinese invasion was to deprive India of its moral leadership in the world especially among the Afro-Asian countries, and to put pressure on it to join the socialist camp. China’s collusion with Pakistan is a clear indication of this political ambition.

Perhaps China miscalculated its political power strategy. The support of the Western countries to India compelled China to rethink its strategy. India’s unity in the face of Chinese aggression was another deterrent for China to achieve political mileage.

An uneasy truce had been prevailing for a long time since the October, 1962 war. Neither side made a serious effort to normalise the situation on the border. The Colombo powers, spearheaded by Ceylon (now Sri Lanka) and the erstwhile Soviet Union failed to bring about a respectable agreement between the two countries. Several countries condemned China as an aggressor. However, Cuba, Albania and Portugal supported the Chinese.

Of late, leaders of both the countries have engaged themselves in improving the bilateral relations. Several meetings have been held to resolve the problem of border issues. A major development took place in October, 2003 when China made a significant change in its official website. It removed the mention of Sikkim from its list of nations.

In May, 2004, China recognised Sikkim as a part of India for the first time. The world map in World Affairs Year Book 2003/2004 does not show Sikkim as separate country in Asia. It also does not mention Sikkim in its index of countries.

The move was significant since it involves recognition of Sikkim-China border which is a part of the Me Mahon Line. If things go as planned, the two nations should be able to work out the guide lines for transforming the Line of Actual Control (LoAC) into a mutually acceptable and internationally recognised boundary. However, China still insists that Arunachal Pradesh is a disputed territory.

China has also suggested a ‘package deal’. It asked India to accept Chinese domination over Aksai Chin in return of China’s acceptance of Me Mahon Line as the international boundary. India, however, has advocated ‘sector-by-sector’ approach. Indian side is hopeful because China has settled border disputes with Russia and Vietnam. India: Boundaries with China, Nepal and Bhutan

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