Sandhya (ruler of Kamarupa)
Gaudeshwar Raja Sandhya was the ruler of Kamarupa in north-eastern India in the present-day state of Assam. He founded the Kamata Kingdom when he moved his capital west to Kamatapur sometime after 1257 CE.
Accession
He became the ruler of Kamarupa in 1228, when Sultan Nasiruddin Mahmud Shah, who had earlier killed his predecessor Raja Prithu in 1228 AD, However, after Nasir-ud-din Mahmud withdrew from Kamrup, Sandhya stopped paying tribute and declared independence of his kingdom.
War with Lakhnauti
In 1229, after the death of Nasiruddin, Sandhya drove the Muslims out of his territory and captured territory until Karatoya River. After that, to avenge the previous defeats, he invaded the western border of Gaur and annexed regions across the Karatoya into his kingdom. In retaliation, Malik Ikhtiyaruddin Yuzbak the governor of Bengal under Delhi Sultanate attempted an invasion on Sandhya's domain in 1257. However, Sandhya resisted the invasion, captured and executed Malik Ikhtiyaruddin Yuzbak.
After this attack, Sandhya moved his capital from Kamarupanagara to Kamatapur in present-day Cooch Behar district. He established a new kingdom called the Kamata Kingdom.