Explanation:

Charaideo district is an administrative district in the state of Assam in India. It was formally declared a new district of the state on 15 August 2015 by then Chief Minister of Assam Tarun Gogoi. It has been carved out of Sivasagar district with Sonari as its administrative headquarter. It comes under Upper Assam division.Charaideo was established by the first Ahom king Chaolung Sukaphaa. The name Charaideo originated from Tai-Ahom word Che Rai Doi or Doi Che Rai which means the shining city on the hills. The Che-Rai-Doi Assamised into Charaideo or Charai-khorong.