Historians believe that the Mizos are a part of the great wave of the
Mongolian race spilling over into the eastern and southern India centuries ago.
Their sojourn in Western Burma, into which they eventually around seventh
century, is estimated to last about two centuries.
The Mizo history in the 18th and 19th Century is marked by many instances of tribal raids and retaliatory expeditions of security. Mizo Hills were formally declared as part of the British-India by a proclamation in 1895. North and south hills were united into Lushai Hills district in 1898 with Aizawl as its headquarters.
The process of the consolidated of the British administration in tribal dominated area in Assam stated in 1919 when Lushai Hills along with some other hill districts was declared a Backward Tract under government of India Act. The tribal districts of Assam including Lushai Hills were declared Excluded Area in 1935.