Gangtok District, is an administrative district of the Indian state of Sikkim. It was renamed in 2021 as a result of administrative reorganisation of the state, which also saw three subdivisions of the East Sikkim district spawned off as a separate Pakyong district. The headquarters of the Gangtok district is Gangtok, which is also the state capital. Gangtok is the hub of all administrative activity in the state. The district is bounded by the Pakyong district in the south and southeast, Bhutan in the east, the People's Republic of China in the northeast, Mangan District in the north and Namchi District in the west. The civilian region is administered by a district collector, appointed by the state government. A major general is assigned to administer military forces in the district. As of 2011 it is the most populous of the six districts of Sikkim. History East Sikkim was part of the kingdom of Sikkim for most of its history. In the 19th century, the district was under the rule of the Bhutanese. After the Anglo Bhutan War, the territory was virtually under the command of the British forces. After India's independence in 1947, the area was part of the kingdom of Sikkim under the protection of India. During the Sino-Indian War of 1962, the Nathula Pass witnessed a few skirmishes between India and China. In 1975, the Sikkim formally became part of the Indian Union as India's 22nd state. The district was under the occupation of the Nepalese for 30 years in the eighteenth and nineteenth centuries. Geography The district occupies an area of . The two important Mountain Passes of East Sikkim are Nathula and Jelepla, both passes connects Sikkim with China. Military-wise, the district is a very sensitive area with the Indian army having control over most areas east of Gangtok and near its borders with People's Republic of China and Bhutan. Visitors to this region are restricted and just a few areas are open to tourists in the areas east of Gangtok. Popular tourist locales of East Sikkim and Pakyong districts are the Tsongmo Lake, Lake Menmecho, Dzuluk, Baba Mandir, Gnathang Valley, Elephant Lake Kupup, Lungthung View Point, Tukla Valley, Thambi View Point and the Nathu La pass. The pass was first opened during the 1904 Younghusband Expedition to Tibet. It saw a tremendous boom in trade during 1950–1959 when the Chinese troops occupying Tibet were supplied