 The Hindu priests and Brahmins named him as Swargadeo Udayaditya Singha, while the Tai-Ahom priests conferred on him the title Sunyatphaa.Udayaditya Singha ascended the throne at a time when the Ahom-Mughal war that started during the reign of his elder brother Swargadeo Chakradhwaj Singha was at its climax.The Mughal army led by the Rajput king Raja Ram Singh I of Amber was desperately trying to conquer the military outpost of Guwahati, while the Ahom forces led by Lachit Borphukan and Atan Burhagohain was bravely defending it against all odds.