The Anglo-Nepalese War of 1816, which led to the defeat of the Gorkha Shah monarchy of Nepal, resulted in the kingdom becoming a de jure protectorate, but a de facto protected state of the East India Company.
A brief war between Bhutan and the British Raj in 1864 resulted in the Treaty of Sinchula, which forced Bhutan to relinquish territory and defined its relationship with the British.