Tripura is a state in North-East India, with an area of 4,051 sq. mi. or 10,491.69 kmē. Tripura has disputed borders and is surrounded by Bangladesh on the north, south, and west. The Indian states of Assam and Mizoram lie to the east. The capital is Agartala and the main languages spoken is Bengali. It was formerly an independent Tripuri kingdom and was merged with independent India on 15 October 1949 by the Tripura Merger Agreement. It was also known as Hill Tippera (anglicized version of Tripura) during the British Raj period and has a history of over 2500 years and 186 kings.