AMAR SIṄGH THĀPĀ, Nepalese general, was the son of Bhīm Sen Thāpā, the prime minister of Nepal. In 1794, he conquered Kumāoṅ and began extending Gurkhā dominions westwards. He subdued the Gaṛhvāl state lying between the Gaṅga and the Yamunā. In 1805 he crossed the River Yamunā and overran most of the Shimlā hill states lying between the Yamunā and the Sutlej. The Rājā of Bilāspur solicited Amar Siṅgh's help against Saṅsār Chand, establishing his authority over the Kāṅgṛā hills. On hearing the news of Amar Siṅgh's advance, Saṅsār Chand raised the siege of Bilāspur and retired. Amar Siṅgh crossed the rivers Sutlej and Beās unopposed and defeated Saṅsār Chand at Mahal Morīāṅ in May 1806. He then laid siege to the Kāṅgṛā Fort. The Rājā sought the help of Mahārājā Raṇjīt Siṅgh who drove away the Gurkhās but himself occupied the Fort. Amar Siṅgh established himself at Arkī, near Shimlā, and made overtures to the British soliciting their support against Raṇjīt Siṅgh. They rejected the proposal. During the Gurkhā war of 1814-16, Amar Siṅgh in vain asked for Raṇjīt Siṅgh's help against the British. There being no response from the Mahārājā, Amar Siṅgh surrendered to the British who allowed him to retire unmolested to Nepal.