In 1815, an expedition to Kumaon was sent under Lt. Col. Gardiner. The hills of Garhwal and Kumaon had been drained of soldiers to supply the urgent calls of the Gurkhas both in the east and the west.

This further complicated matters for the Gurkhas. The British force
captured Almora on 27th April and the Gurkhas under Bam Sah evacuated Kumaon.

Amar Singh resisted Gen. Ochterlony at Malaun but his force slowly deserted him and fled into the hills in an attempt to reach Nepal. 

When only 200 men remained he gave up the forts of Malaun and Jaithak. The local Garhwalis overran the fort of Lobha and mercilessly killed the Gurkha soldiers there. 

Thus, when the Gurkha power was broken due to the invasion by the British force, the Garhwalis exactcd full payment of the debt of blood and cruelty. 

Isolated bands were massacred or driven away to die of exposure and starvation in the rugged mountains. 

Everywhere, the people of Garhwal took revenge and meted out to their oppressors a savage punishment for their deeds of cruelty in the past decades of Gurkha rule.