1790 he had re-established Marathi power over North India. When the Marathi army crossed the  Narmada  in February 1770, the  Jat  king  Nawal Singh  of  Bharatpur  opposed them. However, in the battle on 6 April 1770 Mahadji defeated him & Marathi supremacy over the North was re-established. 10. Marathis Capture Karachi,