The Siege of Ambur was conducted by a combined force of Mysorean

Kingdom of Mysore

The Kingdom of Mysore was a kingdom of southern India, traditionally believed to have been founded in 1399 in the vicinity of the modern city of Mysore. The kingdom, which was ruled by the Wodeyar family, initially served as a vassal state of the Vijayanagara Empire...

 and Hyderabadi

Hyderabad State

-After Indian independence :When India gained independence in 1947 and Pakistan came into existence in 1947, the British left the local rulers of the princely states the choice of whether to join one of the new dominions or to remain independent...

 troops under the command of Hyder Ali

Hyder Ali

Hyder Ali was the de facto ruler of the Kingdom of Mysore in southern India. Born Hyder Naik, he distinguished himself militarily, eventually drawing the attention of Mysore's rulers...

 against the town of Ambur

Ambur

Ambur Ambur is a developed Industrial Town of Vellore District in Tamil Nadu, India. Ambur is located at the 'Palaar' River Bank,on the Chennai - Bangalore Highway, both sides at a distance of approx 180 – 200 km....

 in southern India

India

India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

 during the First Anglo-Mysore War

First Anglo-Mysore War

The First Anglo-Mysore War was a war in India between the Sultanate of Mysore and the British East India Company. The war was instigated in part by the machinations of Asaf Jah II, the Nizam of Hyderabad, who sought to divert the company's resources from attempts to gain control of the Northern...

. The town was defended by a garrison of local troops and a small force of British East India Company

British East India Company

The East India Company was an early English joint-stock company that was formed initially for pursuing trade with the East Indies, but that ended up trading mainly with the Indian subcontinent and China...

troops under the command of Captain Calvert. The siege was lifted when company reinforcements arrived.