Self-determination
In 1947, India gained independence from the British Empire. The empire was in decline but adapted to these circumstances by creating the British Commonwealth—since 1949 the Commonwealth of Nations—which is a free association of equal states. As India obtained its independence, multiple ethnic conflicts emerged in relation to the formation of a statehood during the Partition of India which resulted in Islamic Pakistan and Secular India. Before the advent of the British, no empire based in mainland India had controlled any part of what now makes up the country's Northeast, part of the reason for the ongoing insurgency in Northeast India. In 1971 Bangladesh obtained independence from Pakistan.
Indian independence movement
The Indian self-rule movement was a mass-based movement that encompassed various sections of society. It also underwent a process of constant ideological evolution. Although the basic ideology of the movement was anti-colonial, it was supported by a vision of independent capitalist economic development coupled with a secular, democratic, republican, and civil-libertarian political structure. After the 1930s, the movement took on a strong socialist orientation, owing to the influence of Bhagat Singh's demand of Purna Swaraj (Complete Self-Rule). The work of these various movements led ultimately to the Indian Independence Act 1945, which ended the suzerainty in India and the creation of Pakistan. India remained a Dominion of the Crown until 26 January 1950, when the "Constitution of India" came into force, establishing the Republic of India; Pakistan was a dominion until 1956, when it adopted its first republican constitution. In 1971, East Pakistan declared independence as the People's Republic of Bangladesh.