Jai Singh was born in a Jat family of the village Kahna, 21 km southwest of Lahore.

[2] Working in collaboration with Jassa Singh Ramgarhia, he seized a part of Riarki comprising the district of Gurdaspur and upper portions of Amritsar.

His headquarters shifted from his wife's village at Sohian, 15 km from Amritsar to Batala to Mukerian.

Due to Brij Raj's poor character, the Raja wanted to choose his younger son as his successor.

Unable to face the Bhangis directly, Jai Singh employed a strategic plan.

Ranjit Dev, seeking to stabilize his position, bribed Jai Singh with a large sum of money.

Before leaving Jammu, Mahan Singh, although only ten years old, proposed a bond of brotherhood to Brij Raj Dev.

By this time, Maha Singh had sent a strong contingent of 1,000 troops under his two commanders, Daya Ram and Muhammad Salah.

Along with Sansar Chand's men, they besieged the Kangra fort, and the siege lasted for six months.

Maha Singh's men ran short of money, and Sansar Chand declined to pay anything before the fort fell.