Mahasu (region)
Mahasu also known as Mahasudesh or Mahadesh, is a term used to refer to the historical and cultural homeland of the Mahasui people primarily covering the upper part of the Northern Indian state of Himachal Pradesh, western parts of the state of Uttarakhand and hilly parts of the state of Haryana. In Himachal Pradesh it covers the districts of Shimla, Solan, Sirmaur, Kullu, upper parts of Mandi, some south-western parts of Kinnaur and Bara Bhangal area of Kangra, in Uttarakhand it covers Jaunsar-Bawar of Dehradun district and Bangan, Parvat, Rawain, etc.