Anglo Gurkha War
The Nepal-India boundary conflict had sparked the Anglo-War of 1814–16 and placed the Gurkhas under British control.
In the vain hope of help during the war, the Gurkhas sent several missions to China.
The conflict concluded with the conclusion of the Sugauli Treaty in 1816, which ceded to the British nearly a third of Nepal’s territory.
By the treaty, Nepal relinquished all claims to the controversial Tarai, or lowland land, and ceded its conquests west of the Kali River and extended to the Sutlej River.
Nepal remained autonomous but provided a British citizen with the rank of an ambassador to a sovereign country, rather than the supreme government controlling agent of an Indian state.