Q. When was the Treaty of Sugauli signed?
Answer: 1815 AD
Notes: The Treaty of Sugauli, between the British East India Company and Nepal, was signed on 2 December 1815. It ended the Anglo-Nepalese War (1814–1816). The treaty redefined Nepal's boundaries and established a British Resident in Kathmandu. It was formally ratified on 4 March 1816.