 When Limbuwan was ruled by ten kings and when King Mawrong came to prominence, Tibet was ruled by King Tsrong Tsen Gempo.Mawrong went on to ally with Tibetan King Tsrong Tsen Gempo, managed to get Bhutia tribes of Khampa jong to assist him and planned on attacking Limbuwan from the north.King Mawrong attacked Limbuwan, the ten kings of Limbuwan brought their forces and fought decisive battle through Hatia, Walungchung and Tapkey passes in the Himalayas.