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.
Constitutional autochthony
Independence was formally granted to India by the enactment of the Indian Independence Act 1947 though the executive decision to grant India independence was arrived at earlier in the Cabinet Mission Plan in 1946. It was under this Plan that the Constituent Assembly was envisaged and charged with the mandate of drafting the new Constitution for India. This was legally recognised in Section 8 of the Independence Act. The Cabinet Mission Plan had envisaged that the new Constitution would be put to the Crown-in-Parliament for approval.