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.
India–United Kingdom relations
Trade was established between Tudor England and Mughal India in 1600 when Elizabeth I granted the newly formed East India Company a royal charter. After the Mughal Empire's decline in 1707, India was a leading manufacturing country in the world in the early 18th century. It had 22.6 percent share of the world's GDP, by the time British left the country its GDP was near 4%. During 18th century, the East India Company began to gain greater influence in India. The Battle of Plassey in 1757 led to the conquest of Bengal while by 1857, following various treaties and wars with Indian kingdoms (such as the Anglo-Mysore Wars with Tipu Sultan, the Anglo-Maratha Wars and the Anglo-Sikh wars), the East India Company controlled most of the Indian subcontinent. Following the Indian Mutiny of 1857, where Indian sepoys rebelled against their British officers, the East India Company was dissolved the following year. The assets of the British East India Company became so huge that the British government decided to step in. India served as the main base for the British Empire's expansion across Asia and would remain the empire's most important colony until independence. Queen Victoria became Empress of India in 1876. From a small trading outpost, India became the jewel in the British crown.