when did sikkim become full fledged state of india
History of Sikkim Prime Minister Dorji appealed to the Indian Parliament for representation and change of status to statehood. On 14 April 1975, a referendum was held, in which Sikkim voted to merge with the union of India. Sikkim became the 22nd Indian State on 26 April 1975. On 16 May 1975, Sikkim officially became a state of the Indian Union and Lhendup Dorji became head of State (chief minister).
History of the Republic of India The history of the Republic of India begins on 26 January 1950. The country became an independent nation within the British Commonwealth on 15 August 1947. Concurrently the Muslim-majority northwest and east of British India was separated into the Dominion of Pakistan, by the partition of India. The partition led to a population transfer of more than 10 million people between India and Pakistan and the death of about one million people. Indian National Congress leader Jawaharlal Nehru became the first Prime Minister of India, but the leader most associated with the independence struggle, Mahatma Gandhi, accepted no office. The new constitution of 1950 made India a secular and a democratic country.