 In 1681, Gadapani was formally installed as sovereign of Assam under the name Gadadhar Singha (Supaatphaa, 1681-1696).His first act after taking reign was the dispatch of an army against Mansur Khan, which succeeded in recovering Gauhati in August 1682 after a decisive encounter at Itakhuli.The Ahoms expelled Mansur Khan from Gauhati and re-established their possession over the territories extending up to the river Manaha (Manas).