The Dimasa Kingdom (also Kachari kingdom) was a late medieval/early modern kingdom in Assam, Northeast India ruled by Dimasa kings. The Dimasa kingdom and others (Kamata, Chutiya) that developed in the wake of the Kamarupa kingdom were examples of new states that emerged from indigenous communities in medieval Assam as a result of socio-political transformations in these communities. The British finally annexed the kingdom: the plains in 1832 and the hills in 1834. This kingdom gave its name to undivided Cachar district of colonial Assam. And after independence the undivided Cachar district was split into three districts in Assam: Dima Hasao district (formerly North Cachar Hills), Cachar district, Hailakandi district. The Ahom Buranjis called this kingdom Timisa. 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. The name Hiḍimbā continued to be used in the official records when the East India Company took over the administration of Cachar. Origins The origin of the Dimasa Kingdom is not clear. 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, a name first mentioned in a coin from 1520. Some of them had to leave due to a political turmoil and while crossing the Brahmaputra some of them were swept away—therefore, they are called Dimasa ("son of the big river"). The similarity in Dimasa traditions and religious beliefs with those of the Chutiya kingdom supports this tradition of initial unity and then divergence. Linguistic studies too point to a close association between the Dimasa language and the Moran language that was alive till the beginning of the 20th-century, suggesting that the Dimasa kingdom had an eastern Assam presence before the advent of the Ahoms. The Dimasas had a tradition of worshipping Kechai Khaiti, the war goddess common among all Kachari peoples: as the Rabhas, Morans, Tiwas, Koch, Chutias, etc. 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. This supports a tradition that the eastern boundary of the Kachari domain extended up to Mohong