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.
Decolonization
In response to a growing Indian independence movement, the UK made successive reforms to the British Raj, culminating in the Government of India Act (1935). These reforms included creating elected legislative councils in some of the Provinces of British India. Mohandas Karamchand Gandhi, India's independence movement leader, led a peaceful resistance to the British rule. By becoming a symbol of both peace and opposition to British imperialism, many Indians began to view the British as the cause of India's problems leading to a newfound sense of nationalism among its population. With this new wave of Indian nationalism, Gandhi was eventually able to garner the support needed to push back the British and create an independent India in 1947.