The correct answer is January 1948. In January 1948 all the feudatory kingdoms of this State were merged in the Indian Union. In the early 19th century the state became part of the Central Provinces and Berar under the British Raj, and acceded to the Union of India on 1 January 1948, to become part of the Madhya Pradesh in 1956, and later part of the Bastar district of Chhattisgarh state in 2000. Additional InformationA princely state, also called a native state, feudatory state, or Indian state (for those states on the subcontinent), was a vassal state under a local or indigenous or regional ruler in a subsidiary alliance with the East India Company and after 1858 with the British Crown. Though the history of the princely states of the subcontinent dates from at least the classical period of Indian history, the predominant usage of the term princely state specifically refers to a semi-sovereign principality on the Indian subcontinent during the British Raj that was not directly governed by the British, but rather by a local ruler, subject to a form of the indirect rule on some matters.