Dima Hasao district was a part of the Dimasa Kachari kingdom before 1832. The kingdom was extended from Jamuna in the North to the foot-hills of Lushai Hills in the south & from the Kopili in the west to the Angami & Katcha Naga hills beyond the Dhansiri in the east. The Dimasa Kachari kings had their Capitals successively at Kachomari, Dimapur, Maibang, Kashpur & lastly at haridikhor>Horitikor ( Karimganj district near Badarpur). In 1830, the Dimasa king Gobinda Chandra Hasnusa was assassinated by his own general Gambhir Singh, after that the British annexed the southern part of the kingdom on 14 August 1832 under the doctrine of Laps. The rest was ruled by last Dimasa General Tularam Hasnusa. In 1837 a portion of Tularam’s kingdom was further annexed to the British Empire & constituted into a sub-division of Nagaon district in 1837 with Head quarter at Asalu. In 1854, on the death of Senapati Tularam Hasnusa, the remaining portion of his kingdom was finally annexed to the British Empire & added to the Asalu sub-division.
In 1867 this sub-division was abolished & apportioned into three parts among the districts Cachar, Khasi & Jaintia Hills & Nagaon.
The present North Cachar Hills district was included in the old Cachar district with Asalu being only police outpost. In 1880, this portion was constituted into a sub-division with Head quarters at Gunjung under Cachar district.
This head quarter was shifted to Haflong in 1895. Since then Haflong continues to be the Head quarter. In 1951, after commencement of the constitution of India, North Cachar Hills as specified under paragraph 20 of the sixth schedule to the constitution,ceased to be a part of Cachar district. This part along with Mikir Hills constituted a new civil district namely “ United district of North Cachar & Mikir Hills” with effect from 17 November 1951. According to the provision of sixth schedule, two different councils were
