Treaty of Sugauli — Nepal's Border Defined After Anglo-Nepalese War
सुगौली सन्धि — एंग्लो-नेपाल युद्धपछि नेपालको सिमाना निर्धारण
What happened
After losing the war with the British, Nepal had to sign this treaty in 1816. Nepal gave up a huge amount of land — areas that are now parts of northern India and Sikkim. But Nepal kept its freedom and was not made a colony. This treaty still causes arguments today because the exact location of Nepal's western border was never perfectly agreed upon.
Full Verified Record
Signed on 4 March 1816, the Treaty of Sugauli ended the Anglo-Nepalese War. Nepal ceded to the British East India Company: the entirety of Sikkim, Kumaon, Garhwal, and the eastern and western Terai strips. Nepal also agreed to: (1) permit a British Resident in Kathmandu, (2) not employ Americans or Europeans without British consent, and (3) withdraw from disputed border territories. Nepal retained its sovereignty — a crucial point — and the treaty explicitly recognised Nepal as an independent state. The treaty's Article 5 defines the Kali River as the western boundary, the source of the current Kalapani/Limpiyadhura dispute with India, which claims 'Kali' means a different river branch than Nepal does.
४ मार्च १८१६ मा हस्ताक्षरित सुगौली सन्धिले एंग्लो-नेपाल युद्ध समाप्त गर्यो। नेपालले सिक्किम, कुमाऊँ, गढवाल र तराईका पट्टीहरू ब्रिटिश कम्पनीलाई सुम्पियो। नेपालले आफ्नो सार्वभौमिकता कायम राख्यो।
Then · why it mattered
The Sugauli Treaty defined Nepal's modern borders and set the terms of its relationship with British India for over a century. Its ambiguity around the Kali River's source is the direct cause of the ongoing Kalapani territorial dispute between Nepal and India — a live geopolitical issue in 2026. The treaty also enabled Gurkha recruitment, which became a major part of Nepal's military and economic identity.
Now · why it still matters
Nepal's identity as a state that was never colonised — and the Gurkha military tradition — both date from this war.
Who was affected
All inhabitants of the ceded territories — Kumaon, Garhwal, Sikkim — who came under British rule. Nepal's court lost political influence over these regions. Generations of border communities on both sides.
Verification
verified
Editorial status
approved
Fact sensitivity
Level 1 of 5
Last updated
22 Jun 2026