In 1768 Nazir Khan Rohilla came from Delhi to realize tribute from Patiaia. Amar Singh invited help from Majha Sikhs. A battle was fought at Miran near Barnala in which the Khan was slain. And Maharaja Of Patiala expend his Kingdom and make powerful than other States of Punjab.
Reference:-
- Muhammad Latif, Sayyid, Panjab meh Lahore, 211. Nawazish Ali Sayyid, 625-28, 630-31.
- History of Sikhs vol 5 by Hari ram Gupta