He ordered various unification campaigns in the West to increase Nepalese boundary. Kangda, Kumaon and Gadhwal kingdom was won by Nepal in the battle. His second brother General Kaji Nain Singh Thapa Chhetri died in the battle. In 1811, he was made the Commander-in-Chief of Nepalese army for the first time. In November 1814, his father General Sanukaji Amar Singh Thapa died who was defending the His niece Queen Lalita Tripurasundari was the youngest wife of King Rana Bahadur Shah and the ruling Queen Mother. In 1814, he accepted the British India company challenge to start Anglo-Nepalese War. He lost the war but remained independent from British. He built the Dharahara (Bhimsen Tower), watertaps, ponds, pavements and many temples.