The Anglo-Nepalese War, also known as the Gorkha War, was fought between the British East India Company and the Kingdom of Nepal. The conflict was caused by territorial disputes and expansionist ambitions on both sides. Nepal had expanded westward and eastward in the late 18th century, bringing it into conflict with British interests in northern India. Fighting took place across rugged Himalayan terrain, with the British facing strong resistance from Nepalese forces under commanders such as Amar Singh Thapa. Early British setbacks were followed by advances under leaders like Sir David Ochterlony. The war ended with the Treaty of Sugauli. The Treaty of Sugauli was concluded to bring an end to the prolonged conflict between the British East India Company and the Kingdom of Nepal, as both sides had incurred significant losses and could no longer sustain the ongoing hostilities.