After meeting with Guru Gobind Singh on 3 September 1708, he turned into a Sikh. The Guru requested him to go to Khanda and battle the Mughals with the assistance of the Sikh armed force in Kaithal.

He crushed Mughals in the Battle of Samana in the year 1708 and acquired the Mughal city of Samana, executing around 10,000 Mohammedans.
Samana printed coins. With this treasury the Sikhs turned out to be quite fiscally stable. The Sikhs then acquired Mustafabad and Sadhora (close to Jagadhri) in a very short time.The Sikhs at that point acquired the Cis-Sutlej regions of Punjab, including Malerkotla and Nahan.
In these moves, Sikhs executed Wazir Khan in the Battle of Chappar Chiri, on 12 May 1710, the Governor of Sirhind and Dewan Suchanand, who were in charge of the affliction of the two most youthful children of Guru Gobind Singh. After two days the Sikhs acquired Sirhind. Banda Singh was presently responsible for domain from the Sutlej to the Yamuna and requested that responsibility for land to be given to the farmers, to give them a chance to live with nobility and self-respect.
Banda Singh Bahadur built up the town of Mukhlisgarh, and made it his capital. He at that point renamed it to Lohgarh (fortification of steel) where he issued his own mint. The coin depicted Lohgarh: "Struck in the City of Peace, delineating the magnificence of civic life, and the decoration of the favored throne".
He quickly settled a state in Punjab for a large portion of half year. Banda Singh sent Sikhs to the Uttar Pradesh and Sikhs to take control over Saharanpur, Jalalabad, Muzaffarnagar and other adjacent zones, conveying alleviation to the quelled population. In the districts of Jalandhar and Amritsar, the Sikhs began battling for the privileges of the general population. Banda Singh Bahadur captured Rahon in the wake of vanquishing Mughals in the Battle of Rahon (1710). Sikhs utilized their recently settled capacity to evacuate degenerate authorities and supplant them with legitimate ones.
Brave Sikh Soldier!!!