Tripura State, also known as Hill Tipperah, was a princely state in India during the period of the British Raj and for some two years after the departure of the British. Its rulers belonged to the Manikya dynasty and until August 1947 the state was in a subsidiary alliance, from which it was released by the Indian Independence Act 1947. The state acceded to the newly independent Indian Union on 13 August 1947, and subsequently merged into the Indian Union in October 1949.