Explanation:

The Barak Valley is located in the southern region of the Indian state of Assam. The main city of the valley is Silchar. The region is named after the Barak river. The Barak valley mainly consists of three administrative districts of Assam - namely Cachar, Karimganj, and Hailakandi.The region was originally part of the Tripura kingdom. In 1562 Chilarai annexed the Cachar region to the Koch kingdom and it became a part of the Koch kingdom administered by his half-brother Kamalnarayan. After the death of Nara Narayan, the region became independent and was ruled by the descendants of Kamalnarayan. In the 17th-century, the last Koch ruler's daughter married the king of the Kachari kingdom, and the rule of Khaspur passed into the hands of the Kachari rulers, who eventually moved their capital from Maibang to Khaspur.