The Partition of India refers to the splitting of British India in August 1947 into two new sovereign dominions: the Union of India, with a Hindu majority, and Pakistan, with a Muslim majority and two non-contiguous wings (West and East Pakistan, the latter becoming Bangladesh in 1971).
Partition was enacted through the Indian Independence Act 1947, passed by the British Parliament on 18 July 1947. The plan was announced by Viceroy Lord Louis Mountbatten on 3 June 1947 (the "3 June Plan" or Mountbatten Plan) after negotiations with the Indian National Congress, led by Jawaharlal Nehru, and the All-India Muslim League, led by Muhammad Ali Jinnah, who had advanced the "two-nation theory" and demanded a separate Muslim state in the Lahore Resolution of 1940.
The boundaries between the two dominions in Punjab and Bengal were drawn by a commission chaired by British lawyer Sir Cyril Radcliffe, whose Radcliffe Line was published on 17 August 1947, two days after independence. The hurried demarcation, combined with the withdrawal of British administration, contributed to one of the largest forced migrations in modern history. Estimates suggest roughly 10–15 million people crossed the new borders, and credible scholarly estimates of deaths from communal violence range from several hundred thousand to around one to two million; precise figures remain disputed.
Partition also left the status of the princely states unresolved. The accession of Jammu and Kashmir to India in October 1947 triggered the First Indo-Pakistani War (1947–48) and seeded a territorial dispute that persists today. Other consequences include:
- The displacement and resettlement of refugees in cities such as Delhi, Karachi, Lahore, and Calcutta.
- Long-running disputes over assets, water (addressed partly by the 1960 Indus Waters Treaty), and borders.
- A foundational reference point in South Asian politics, identity, and historiography.
Partition remains a central case study in decolonisation, self-determination, and the human costs of boundary-making.
Example
In August 1947, the Radcliffe Line divided Punjab and Bengal, prompting millions of Hindus, Muslims, and Sikhs to flee across the new India–Pakistan border.
Frequently asked questions
Pakistan came into being on 14 August 1947 and India on 15 August 1947, under the Indian Independence Act 1947. The Radcliffe boundary award was published on 17 August 1947.
Keep learning