Historical events similar to or like Partition of India

The rule by the British Crown on the Indian subcontinent from 1858 to 1947. Also called Crown rule in India, or direct rule in India. Wikipedia

Second-largest religion in India, with 14.2% of the country's population or approx. 172.2 million people identifying as adherents of Islam . It makes India the country with the largest Muslim population outside Muslim-majority countries. Wikipedia

The predecessors to the contemporary Army of India were many: the sepoy regiments, native cavalry, irregular horse and Indian sapper and miner companies raised by the three British presidencies. Raised under the British Raj in the 19th century by taking the erstwhile presidency armies, merging them, and bringing them under the Crown. Wikipedia

Divided into two sets of territories, one under direct British rule, and the other under the suzerainty of the British Crown, with control over their internal affairs remaining in the hands of their hereditary rulers. The latter included 562 princely states, having different types of revenue sharing arrangements with the British, often depending on their size, population and local conditions. Wikipedia

List of wars involving the Republic of India and its predecessor states. List of wars and conflicts that were fought in the historic Indian subcontinent. Wikipedia

Undoing of colonialism, the latter being the process whereby a nation establishes and maintains its domination of foreign territories (often overseas territories ). The concept particularly applies to the dismantlement, during the second half of the 20th century, of the colonial empires established prior to World War I throughout the world. Wikipedia