The Treaty of Sugauli (also spelled Sugowlee, Sagauli and Segqulee), the treaty that established the boundary line of Nepal, was signed on 4 March 1816 between the East India Company and Guru Gajaraj Mishra following the Anglo-Nepalese War of 1814–16.
Background
Following the Unification of Nepal under Prithvi Narayan Shah, Nepal attempted to enlarge its domains, conquering much of Sikkim in the east and, in the west, the basins of Gandaki and Karnali and the Uttarakhand regions of Garhwal and Kumaon. This brought them in conflict with the British, who controlled directly or indirectly the north Indian plains between Delhi and Calcutta. A series of campaigns termed the Anglo-Nepalese War occurred in 1814–1816. In 1815 the British general Ochterlony evicted the Nepalese from Garhwal and Kumaon across the Kali River, ending their 12-year occupation, which is remembered for its brutality and repression.
Octherlony offered peace terms to the Nepalese demanding British suzerainty in the form of a British resident and the delimitation of Nepal’s territories corresponding roughly to its present-day boundaries. The Nepalese refusal to accede to the terms led to another campaign the following year, targeting the Kathmandu Valley, after which the Nepalese capitulated.
Terms
Historian John Whelpton writes:
Negotiations for a general settlement produced a draft which was initialled at Sagauli in Bihar in December 1815 and required Nepal to give up all territories west and east of its present-day borders, to surrender the entire Tarai and to accept a permanent British representative (or ‘resident’) in Kathmandu. The Nepalese government initially balked at these terms, but agreed to ratify them in March 1816 after Ochterloney occupied the Makwanpur Valley only thirty miles from the capital.
Ongoing disputes
Among the border dispute of the Indo-Nepal boundary, the most significant are in the Susta and Kalapani regions. The two regions cover some 40 km of the Indo-Nepal border.