Partition of India 1947: Mass Migration, Violence and Two Nations

The Partition of India was the division of British India into two independent states, India and Pakistan, which came into being on 14 and 15 August 1947. The new border, known as the Radcliffe Line, split the provinces of Punjab and Bengal and triggered one of the largest and most violent mass migrations in history.

An estimated 10 to 20 million people were uprooted, and between several hundred thousand and perhaps two million were killed in communal violence. Partition shaped the identities of both countries and remains central to their relationship today.

Background and causes

Under British rule, religious identity became increasingly important in Indian politics. Separate electorates for Muslims, introduced in 1909, and earlier measures such as the partition of Bengal in 1905 encouraged politics to be organised along communal lines. The All-India Muslim League, founded in 1906, came to argue that Muslims needed safeguards in any future India dominated by the Hindu majority.

In March 1940 the League, led by Muhammad Ali Jinnah, adopted the Lahore Resolution calling for independent states in the Muslim-majority regions of the northwest and east. This became the demand for Pakistan. The Indian National Congress, led by figures such as Jawaharlal Nehru and Mahatma Gandhi, insisted it represented all Indians and opposed division. Historians still debate what Jinnah actually wanted: some argue that he used the Pakistan demand as a bargaining position to secure Muslim power within a loose Indian federation, while others see a sovereign Pakistan as his goal from the start.

The League’s position grew stronger during the Second World War, when Congress leaders were in prison after the Quit India Movement. In the elections of 1945–1946 the League won almost all Muslim seats. The British Cabinet Mission of 1946 proposed a loose federation to keep India united, but Congress and the League could not agree on how it would work.

The slide into violence

On 16 August 1946 the League called a “Direct Action Day” to press its demand. In Calcutta it was followed by days of killing between Hindus and Muslims in which several thousand people died. Violence spread to Noakhali in eastern Bengal, where Hindus were attacked, and to Bihar, where Muslims were killed in large numbers. In March 1947 attacks on Sikhs and Hindus around Rawalpindi in Punjab showed how dangerous the situation had become in the province with the largest Sikh population.

On 3 June 1947 the viceroy, Lord Mountbatten, announced a plan to partition India and transfer power. Muslim-majority Punjab and Bengal would be divided if their legislators voted for it, which they did. Referendums were held in the North-West Frontier Province and in the Sylhet district of Assam, both of which chose Pakistan. Independence was brought forward to 15 August 1947, leaving just over ten weeks to divide a subcontinent. Sikh leaders, whose community was concentrated in central Punjab, feared that any line would split their population and holy places, and tension in the province rose sharply through the summer.

Drawing the Radcliffe Line

Sir Cyril Radcliffe, a British lawyer who had never visited India, arrived on 8 July 1947 to chair two boundary commissions, for Punjab and for Bengal. Each commission had two judges nominated by Congress and two by the League, who generally disagreed, leaving Radcliffe to decide. He worked from outdated maps and census data, in the heat of a Delhi summer, with about five weeks to finish.

The awards were completed by 12–13 August but were not published until 17 August, two days after independence. Mountbatten feared that publishing them earlier would spoil the independence celebrations and set off violence for which Britain would be held responsible. As a result, millions of people did not know on Independence Day which country they lived in.

The line left Pakistan in two parts, West Pakistan and East Bengal (later East Pakistan), separated by about 1,600 kilometres of Indian territory. Lahore went to Pakistan and Amritsar to India. Disputed decisions, such as the award of most of Gurdaspur district to India, which gave India a land route towards Kashmir, are still debated.

Migration and massacre

The worst violence came in Punjab between August and November 1947. Hindus and Sikhs fled west Punjab and Muslims fled east Punjab, travelling in vast foot columns, bullock carts and overcrowded trains. Armed bands attacked villages, convoys and refugee trains, sometimes arriving at their destination with almost all passengers dead. The Punjab Boundary Force, set up to keep order, was too small and was disbanded on 1 September 1947. Some police and soldiers took part in the violence, while others protected refugees regardless of religion. Organised armed groups linked to political and religious organisations on all sides played a major role in the killings, which were often planned rather than spontaneous.

By the end of 1947 eastern Punjab had lost most of its Muslim population and western Punjab most of its Hindus and Sikhs. Cities such as Lahore and Amritsar, which had been religiously mixed for centuries, were transformed within months. Refugees arrived with little or nothing, and many spent years in camps before being resettled.

Violence also reached Delhi in September 1947, where many Muslims were killed or took refuge in camps at the Purana Qila and Humayun’s Tomb. Migration across the Bengal border was slower but continued for years, with waves of movement in 1950 and later. Hindus left East Bengal in large numbers after riots in 1950, while Muslims moved from West Bengal, Bihar and Assam into East Pakistan. The Nehru–Liaquat Pact of April 1950 tried to protect minorities in both countries and to allow refugees to return, with limited success.

In Sindh, the departure of most Hindus and Sikhs and the arrival of Urdu-speaking Muslim migrants from India, known as Muhajirs, changed cities such as Karachi, which became Pakistan’s first capital.

Women suffered especially brutal violence. Tens of thousands were raped, mutilated, abducted or forced to convert, and some were killed by their own families to “protect their honour”. Both governments later ran programmes to recover abducted women. Under an agreement of December 1947 and later laws, tens of thousands of women were returned across the border, sometimes against their will, because they had married or had children in their new homes.

Key people

• Sir Cyril Radcliffe (1899–1977): British lawyer who chaired the boundary commissions.
• Lord Mountbatten (1900–1979): last viceroy, who set the 15 August timetable.
• Muhammad Ali Jinnah (1876–1948): Muslim League leader and first governor-general of Pakistan.
• Jawaharlal Nehru (1889–1964): Congress leader and India’s first prime minister.
• Mahatma Gandhi (1869–1948): opposed partition and fasted in Calcutta and Delhi to stop the killings.

By the numbers

Consequences

The two new states faced enormous refugee crises. India and Pakistan built refugee camps and new towns, and the loss and resettlement of property became a long-running source of dispute. Within weeks they were at war over Kashmir in the First Kashmir War. Gandhi, who had fasted in Delhi in January 1948 to stop communal killing and to press India to pay Pakistan its share of assets, was assassinated by a Hindu nationalist on 30 January 1948.

The division of Pakistan into two distant wings proved unstable. East Pakistan broke away after the Bangladesh Liberation War of 1971, becoming Bangladesh.

Legacy

Partition left deep scars in family memory across South Asia and its diasporas in Britain and elsewhere. For decades it was rarely discussed publicly, but since the 1990s oral history projects, novels, films and museums, such as the Partition Museum in Amritsar opened in 2017, have recorded survivors’ experiences.

Historians still debate responsibility: the British for the speed of their withdrawal, the Congress and League leaders for their choices in 1946–1947, and the longer history of communal politics. The legacy of 1947 continues to shape relations between India and Pakistan, the Kashmir dispute and the place of religious minorities in all three successor countries. The political side of the story is told in the article on Indian Independence.

Timeline

• 1940, 23 March: The Muslim League adopts the Lahore Resolution.
• 1946, 16 August: Direct Action Day leads to mass killings in Calcutta.
• 1947, March: Violence breaks out around Rawalpindi in Punjab.
• 1947, 3 June: Mountbatten announces the partition plan.
• 1947, 8 July: Sir Cyril Radcliffe arrives in India.
• 1947, 14–15 August: Pakistan and India become independent.
• 1947, 17 August: The Radcliffe awards are published.
• 1947, September: Violence peaks in Punjab and reaches Delhi.
• 1948, 30 January: Mahatma Gandhi is assassinated in Delhi.

Why it matters

The Partition of India created two nations and later a third, Bangladesh, and displaced more people in a short time than almost any other event of the twentieth century. Its violence and its unresolved disputes, above all over Kashmir, continue to shape the politics and memories of South Asia.