The Mizo people (Mizo: Mizo hnam) are an ethnic group native to north-eastern India, western Burma (Myanmar) and eastern Bangladesh who speak any of various Mizo languages.

The present Indian state of Mizoram (literally "Mizoland") was called the Lushai Hills and was a district of Assam, before it became a Union Territory and afterwards a full-fledged state. The Lusei people were the first Mizo people to have an external exposure and hence the ethnicity was initially known as the Lushai people. The demand for a distinct political territory for the people of Lushai Hills resulted in the creation of a separate Union Territory and afterwards the State of Mizoram.

A powerful factor in their political organising was the movement to call themselves Mizo - rather than by distinct clan names such as Hmar people, Lushei, Ralte, Gangte, Mara, Pawi, etc. Their languages (of which the largest is Lusei Duhlian dialect) belong to the Tibeto-Burman language family.

Source: http://en.wikipedia.org/wiki/Mizo_people