[12] In the 18th century, a divine Hindu origin was constructed for the rulers of the Kachari kingdom and it was named Hidimba, and the kings as Hidimbesvar.

[16] According to tradition, the Dimasa had their domain in Kamarupa and their king belonged to a lineage called Ha-tsung-tsa or Ha-cheng-sa,[17] a name first mentioned in a coin from 1520.

According to legend Hachengsa (or Hasengcha) was an extraordinary boy brought up by a tiger and a tigress in a forest near Dimapur who replaced the existing king following divine oracles; which likely indicates the emergence of a strong military leader able to consolidate power.

[28] Subsequently, the Hasengcha Sengfang (clan) emerged and beginning with Khorapha (1520 in Dimapur),[29] the Dimasa kings continued to draw lineage from Hachengcha in Maibong and Khaspur till the 19th century.

[31] The historical accounts of the Dimasas begin with mentions in Ahom chronicles: according to an account in a Buranji, the first Ahom king Sukaphaa (r. 1228–1268) encountered a Kachari group in the Tirap region (currently in Arunachal Pradesh), who informed him that they along with their chief had to leave a place called Mohung (salt springs) losing it to the Nagas and that they were settled near the Dikhou river.

[45] One of the earliest mention of Kachari is found in the Bhagavat of Sankardev in the section composed during the later part of his life in the Koch kingdom where he uses it synonymously with Kirata.

[47] A coin dated 1520 commemorating a decisive victory over enemies is one of the earliest direct evidence of the historical kingdom.

[48] Since no conflict with the Kacharis is mentioned in the Ahom Buranjis it is conjectured that the enemy could have been the nascent Koch kingdom of Biswa Singha.

The Ahoms force under Kan-Seng then reached Dimapur following which Detchung, a son of the earlier king Khorapha, approached Suhungmung at Nenguriya and submitted his claim to the Dimasa throne.

In either 1558 or 1559 a son of Detsung, Madanakumara, assumed the throne with the name Nirbhaya Narayana,[67] and established his capital at Maibang in the North Cachar hills.

[68] Not all the Kachari people accompanied the rulers from Dimapur to Maibong—and those who remained in the plains developed independently in language and customs.

[70] Khorapha, the earlier king, claimed in the coin issued earlier in 1520 from Dimapur that he had defeated the enemies of Hachengsa without specifying his relationship to him but Nirbhaya Narayana and his successors in Maibong for the next hundred years or so claimed in their coins that they belonged to the family of Hachensa;[71] thereby signalling a change in the mode of legitimacy from deed to birth.

[73][74] After subjugating the Ahoms in 1564, the Koch commander Chilarai advanced on Marangi, subjugated Dimarua and finally advanced on the Dimasa kingdom, then possibly under Durlabh Narayan or his predecessor Nirbhay Narayan and made it into a feudatory of the Koch kingdom.

[80] The king at Maibang was assisted in his state duties by a council of ministers (Patra and Bhandari), led by a chief called Barbhandari.

The representatives sat in the Mel mandap (Council Hall) according to the status of the Sengphong and which provided a counterfoil to royal powers.

Some of the clans provided specialized services to the state ministers, ambassadors, storekeepers, court writers, and other bureaucrats and ultimately developed into professional groups, e.g. Songyasa (king's cooks), Nablaisa (fishermen).

In 1790, a formal act of conversion took place and Gopichandranarayan and his brother Laxmichandranarayan were proclaimed to be Hindus of the Kshatriya caste.

[84] The King of Manipur sought the help of Krishna Chandra Dwaja Narayan Hasnu Kachari against the Burmese Army.

The King Krishna Chandra defeated Burmese in the war and in lieu was offered the Manipuri Princess Induprabha.

[citation needed] The fictitious but widely believed legend that was constructed by the Hindu Brahmins at Khaspur goes as follows:[85] During their exile, the Pandavas came to the Kachari Kingdom where Bhima fell in love with Hidimbi (sister of Hidimba).

The last king, Govinda Chandra Hasnu, was restored by the British after the Yandabo Treaty in 1826, but he was unable to subjugate Senapati Tularam who ruled the hilly regions.