Treaty of Tumlong

Treaty of Tumlong
SignedMarch 1861
LocationTumlong
Conditionmade Sikkim a "de facto" protectorate of the British Empire
SignatoriesSir Ashley Eden for British Empire and Sidkeong Namgyal for Sikkim
Parties British Empire
Sikkim
LanguageEnglish

The Treaty of Tumlong was a March 1861 treaty between the British Empire and the Kingdom of Sikkim in present-day north-east India. Signed by Sir Ashley Eden on behalf of the British and by the Sikkimese Chogyal, Sidkeong Namgyal when his father Tsugphud Namgyal refused to return from Tibet, the treaty secured protection for travellers to Sikkim and guaranteed free trade, thereby making the state a de facto British protectorate.[1]