After the fall of Lamjung in the battle against the Gorkhali (Nepali) forces, he was captured and brought to Kathmandu as a prisoner of war.

As the British forces had control over the fort of Deuthal, 1,000 yards (910 m) away from Malaun fort, the whole of the Western Region was at stake, which made Sardar Bhakti Thapa Chhetri go to the battlefield, taking naked Khukuri and sword on his hand, along with 2,000 Nepali soldiers amidst the fierce gun-firing of the British army on April 16, 1815.

In this battle when Sardar Bhakti Thapa Chhetri tried to capture a British cannon, he was hit by a bullet at his heart.

Major David Ochterlony, handed over very respectfully to the Nepali army, the dead body of Sardar Bhakti Thapa Chhetri after covering it with dosalla (a woollen shawl).

The Deothal battle marked a significant moment in the Anglo-Nepal War, demonstrating Nepalese resilience despite the eventual British advance.

Historians and local traditions often describe Sardar Bhakti Thapa's actions at the Deothal battle as legendary, reflecting his dedication to Nepal's sovereignty.

One day he was sleeping on a big boulder not far away from his house in a remote village of Lamjung while his flocks of goats grazed the buckwheat field of the neighbour.

The old neighbour woman stormed out of her house into the place where Bhakti Thapa was fast asleep in a rage cursing him for his misdeeds.

The neighbor, witnessing the event, believed that Bhakti Thapa might have a significant destiny, a sentiment that contributed to local folklore about his early life.

After some years a grand ritual was performed to solemnize the brotherhood relationship (in Nepali metairi) between Bhakti Thapa and that big boulder.

It is said that at that very moment during the Anglo-Nepal War when Bhakti Thapa fell in the Deothal Battlefield on April 16, 1815, the big boulder near his native home also cracked with a loud explosion.

Bhakti Thapa joined the unification campaign in 1789 at a time when the further advance of the Nepalese force to the west was completely blocked for more than two years by the then-powerful kingdom of Jumla.

It is said that Jumla had collected an army of twenty-two thousand men to face the Gorkhalis, a force far superior to anything the Gorkhalis could put in the field at that time In the first major military operation itself Bhakti Thapa had demonstrated his exceptionally brilliant skill in launching a very successful operation under the most adverse condition that was sure to astonish anyone.

Within a very short period of just two years, from 1789 to 1791, the western boundary of the Great Nepal had extended nearly as far as the Sutlez River (now India).

The royal court sent the following orders to Bhakti Thapa regarding the abolition of slave trading in Garhwal: Let not there be injustice in any matter.

According to Sainikitihas of Nepal, Bhakti Thapa stationed in Kumaun virtually single-handedly succeeded in quelling the unrest fomented by the rulers of the old regime in the vast western regions which were very recently merged into the Great Nepal, despite the fact that he was made supreme commander and administrator of the territory stretching from Chepe-Marshyangdi to almost Sutlez River only in 1794.

The Nepal-China war concluded with a treaty that reflected mutual interest in ending hostilities, though the resolution left some territorial and political questions unresolved.

Immediately after the signing of the peace treaty with China, Bhakti Thapa headquartered in Kumaun (now India) became the governor and chief commander of the whole region from the Chepe-Marshyangdi to almost the Sutlez River (in Pakistan).

The intention of Kirkpatrick's visit could hardly be anything else but to watch closely Nepal's speedy preparation for the next phase of the unification campaign that had officially led to the emergence of Bhakti Thapa as its head.

The circumstances, under which the visit of Kirkpatrick to Kathmandu took place, clearly show that the Company administration in India w all the time watching Nepal with great suspicion.

It was virtually modern-type warfare extended over a period of three calendar years and necessitating to protect the entire region bordering the enemy-held territory.

Nepalese forces stationed within the shelter of the fortress were not only able to defend their position against an invading enemy many times superior in strength, but they even shocked them by their dreadful counteroffensive that used to be accompanied by big losses on the British side.

Towards the middle of 1815, Amar Singh Thapa, chief of the Nepalese forces fighting on the western front, was confined within a small area of the Malaun fort.

The fate of Nepal was going to be in the hands of the Governor General Lord Hastings, who was determined to solidify Company rule in India.

He could be forced not to take any such decision detrimental to the honour of Nepal only if he perceived that such action could pose a serious threat to the continuance of Company rule in India.

The following day in the morning, Bhakti Thapa, at the age of 73, led a daring counterattack against the East India Company force entrenched at Deuthal.

[6] Contemporary British accounts acknowledged Bhakti Thapa's bravery at Deothal, though the battle ultimately resulted in heavy losses for the Nepalese forces.