Srimanta Sankardev was a 15th–16th century Assamese polymath; a saint-scholar, poet, playwright, dancer, actor, musician, artist social-religious reformer and a figure of importance in the cultural and religious history of the Bhakti movement in Assam. He is credited with building on past cultural relics and devising new forms of music (Borgeet), theatrical performance, dance (Sattriya), literary language (Brajavali). Besides, he has left a literary oeuvre of trans-created scriptures, poetry and theological works written in Sanskrit, Assamese and Brajavali. The Bhagavatic religious movement he started, Ekasarana Dharma and also called Neo-Vaishnavite movement, influenced two medieval kingdoms – Koch and the Ahom kingdom – and the assembly of devotees he initiated evolved over time into monastic centers called Sattras, which continue to be important socio-religious institutions in Assam and to a lesser extent in North Bengal.

The Dimasa Kingdom was a late medieval/early modern kingdom in Assam, Northeast India ruled by Dimasa kings. The Dimasa kingdom and others 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, Cachar district, Hailakandi district. The Ahom Buranjis called this kingdom Timisa.