Valley, district or people · The Tibetan lands: houses, monasteries and clan chiefs, with no king · as at first light, 1 January 1200

Dromo

The Chumbi valley (Dromo) is a wedge of the Tibetan plateau that reaches south of the Himalaya, between Sikkim and Bhutan, at the head of the oldest trade road from Tibet to Bengal.

It was used as a trade route between Tibet and India in the first millennium (en Wikipedia, Chumbi Valley). The page gives one event: in 1206 Bakhtiyar Khilji invaded Tibet through the valley and the Tibetans beat him back. That is six years after 1 January 1200 and depends on his conquests in Bengal; see the likely course.

Who holds it

Name
not known; the nearest dated name is the lotsawa Yontendrak (born 973), said in fourteenth-century texts to have been given control of the road to India
Title
Lord of the Dromo road
Since
not pinned
Confidence
low

En Wikipedia (Chumbi Valley) names Yontendrak only. No holder of 1200 is named.

Overlord

none: no one rules Tibet in 1200; the house answers to its own patrons and to the custom of the valleys

What it holds

Allies and rivals

Sikkim's Lepcha and Bhutan's Mon valleys on either side; Gyantse and Ralung to the north.

How things stand that morning

The gate of the southern road; the lord is not known.

Wealth

No source we could open gives figures; the usual base is estates and serfs, herds, pass tolls, trade in salt, wool, tea and barley, and the gifts of patrons.

Military

No standing army; the house or lord calls on retainers, tenants and kin. No troop numbers are given by any source we could open.

Customs

Tibetan Buddhist, with Bon communities and village cults; barley, peas and butter farmers in the valleys and herders on the heights; the people on a house's or lord's estate are bound to it as serfs (mi ser). Disputes go to the lord or the lama of the nearest great house; no code or court of 1200 is described by any source we could open.

Assemblies

not described for 1200; the monks of the great houses meet as an assembly (tshogs) and the village headmen settle local matters, but no source we could open records either.

Tribute

none known; the people owe labour, grain and butter to their lord or house, but no figure or rate is given by any source we could open.

What the year holds

What happened next, if nothing in play changes it. Each event carries what it depends on and what would stop it.

  1. 1205-1206Bakhtiyar Khilji, the Ghurid conqueror of Bihar and Bengal, marches north from Bengal; the Chumbi page says he invaded Tibet through the valley in 1206 and was defeated.Depends on: His conquest of Nadia (1203 or 1204) and the march; the route is debated. Stopped by: No Ghurid conquest of Bengal.

Where the sources disagree

  • The gazetteer has a Yadong in Inner Mongolia; Xarsingma is the Tibetan county seat.

Evidence: One page, two facts. Treasury of Lives, the Blue Annals, the Red Annals, Petech, Sorensen and Hazod and Davidson could not be opened in this session (treasuryoflives.org and rigpawiki.org refused the fetch; the archive.org full texts were refused or cut off), so facts marked 'recalled' are from memory of those works and unchecked.

On the map: Modern-unit polygon.

Primary sources for Tibet (centre)

Chronicles, registers, sagas and inscriptions written in or near 1200 that cover this entry. Each has its own page with editions, translations and where to read it.

Sources and studies

  1. Wikipedia, Chumbi Valley

Last revised 4 November 2026. Published 4 November 2026. Suggest a correction on the OMNIA Discord.