Answer:
The division of British India took place on the night between August 14 and 15, 1947, creating two new independent states, India and Pakistan. The division took place at the geographical and administrative level, with the introduction of new territories and the division of civil service, military, infrastructure and other British-Indian property.
The split was based on a desire by Muslims to get their own land, and largely distributed areas where there was a Muslim majority to Pakistan (which also included current Bangladesh) and the rest to India. More or less independent princely states that had been subject to British supremacy, but who were not part of British India, had to choose to join one of the two countries.
The new frontier shared provinces (Bengal and Panjab), communities and in some cases families. As a result, around 15 million people had to move, while up to half a million were killed in the conflicts surrounding the split. The division has also brought tensions and wars between Pakistan and India over disputed areas, such as Kashmir.