Hindu Kush

The Hindu Kush is an 800-kilometre mountain system running northeast to southwest across Afghanistan, Pakistan, and a corner of Tajikistan — up to 240 kilometres wide where it is broadest. It forms the great watershed of the region: the Amu Darya, the ancient Oxus, drains the northern slopes, while the Indus basin collects the waters of the south.[1][2]

A young name with old roots

For all its antiquity as a corridor, the name itself is surprisingly late: it appears nowhere in the early Arab geographers and surfaces first in the fourteenth century, in Ibn Battuta. His explanation gave the popular translation "Hindu-killer" — Indian slaves carried toward Turkestan died in the killing cold of the passes — but other scholars derive the name from Hindu Koh, "mountains of India", the form used at the Mughal court by Abu'l Fazl. Babur's own list of passes shows that in his day the name was restricted to the high range north of Kabul; it spread to cover the whole system only in the nineteenth century.[2][3]

Divisions and peaks

Orographically the range falls into four parts: the western Hindu Kush between the Shibar Pass and the Khawak Pass, rising to about 5,126 metres; the central Hindu Kush up to 6,843 metres; the eastern Hindu Kush beyond the Dorah Pass, where the Afghan–Pakistani border rides the crest and several peaks exceed seven thousand metres; and the Khvaja Muhammad range reaching north toward Badakhshan above 5,800 metres. The highest summit of the entire system, Tirich Mir (7,708 m), stands outside Afghanistan on a side ridge of Pakistan's Chitral; the highest peak within or on the borders of Afghanistan is Noshaq (7,492 m) on the Durand Line — the second highest of the range and the westernmost seven-thousand-metre mountain on earth.[3][4]

The gate of invasions

Because Kabul basin and the oases of Qataghan lie on either side, the western passes carried most of the long-distance trade between India and Bactria/Turan, with the Bamyan–Balkh road carrying the rest. The mountains were also the conduit through which Bronze Age Steppe pastoralists entered the Indian subcontinent in the second millennium BCE, carrying Indo-European languages and a genetic signature now traced through ancient DNA.[1][6] Thousands of years before that, Neolithic farmers carrying haplogroup L had already crossed these same passes, spreading agriculture from the Iranian plateau into the Indus Valley.[1][7] Antiquity made the crossings legendary: the Khawak Pass over which Alexander was said to have passed northward, the Kushan Pass crossed southward, the Khipchak used by Genghis Khan in the early thirteenth century. In times of weak government the pass entrances fell under local control, and it was only under Amir Abdur Rahman Khan that the routes were secured for regular traffic.[5][3]

Modern crossings

Motor traffic came late to the barrier: the first road over the mountains, across the Shibar Pass, opened only in 1933. The transformation came in 1964 with the Soviet-built Salang Tunnel, drilled 2.7 kilometres through the heart of the range at 3,363 metres, which concentrated nearly all north–south transit onto a single artery — and made the tunnel a repeated prize of the wars that followed.[3][2]

Sources

  1. Hindu Kush — Encyclopaedia Britannica
  2. Hindu Kush — Wikipedia
  3. HINDU KUSH — Encyclopaedia Iranica
  4. Noshaq — Wikipedia
  5. Hindu Kush: Study and exploration — Encyclopaedia Britannica
  6. The formation of human populations in South and Central Asia — Narasimhan et al. (2019), Science
  7. Human Y chromosome haplogroup L1-M22 traces Neolithic expansion in West Asia — Pathak et al. (2024), iScience