 To check the increasing power of the three brothers, Kyawswa submitted to the Mongols in January 1297, and was recognised by the Mongol emperor Temür Khan as viceroy of Pagan on 20 March 1297.The brothers resented the new arrangement as a Mongol vassalage as it directly reduced their power.On 17 December 1297, the three brothers overthrew Kyawswa, and founded the Myinsaing Kingdom.