Radcliffe Line
The Radcliffe Line was published on 17 August 1947 as a boundary demarcation line between India and Pakistan upon the Partition of India. It was named after its architect, Sir Cyril Radcliffe, who, as chairman of the Border Commissions, was charged with equitably dividing 175,000 square miles (450,000 km2) of territory with 88 million people. Today its western side still serves as the Indo-Pakistani border and the eastern side serves as the India-Bangladesh border.
On 15 July 1947, the Indian Independence Act 1947 of the Parliament of the United Kingdom stipulated that British rule in India would come to an end just one month later, on 15 August 1947. The Act also stipulated the partition of the Provinces of British India into two new sovereign dominions: the Union of India and the Dominion of Pakistan.
During British India, the Indian Independence Act abandoned the suzerainty of the British Crown over the princely states and dissolved the Indian Empire, so that the rulers of the states found themselves fully independent and were free to decide for themselves whether to accede to one of the new dominions or to remain independent.
Pakistan was intended as a Muslim homeland, while the new India was for the Hindus with a Hindu majority. Muslim-majority British provinces in the north were to become the foundation of Pakistan. The provinces of Baluchistan (91.8% Muslim before partition) and Sindh (72.7%) were granted entirely to Pakistan. However, two provinces did not have an overwhelming majority—Bengal in the north-east (54.4% Muslim) and the Punjab in the north-west (55.7% Muslim). The western part of the Punjab became part of West Pakistan and the eastern part became the Indian state of East Punjab, which was later divided between a smaller Punjab State and two other states. Bengal was also partitioned, into East Bengal (in Pakistan) and West Bengal (in India). Following independence, the North-West Frontier Province (whose borders with Afghanistan had earlier been demarcated by the Durand Line) voted in a referendum to join Pakistan. This controversial referendum was boycotted by the most popular Pukhtun movement in the province at that time. The area is now a province in Pakistan called Khyber Pakhtunkhwa.
...
Wikipedia