The Bangladesh genocide was the ethnic cleansing of Bengalis, especially Bengali Hindus, residing in East Pakistan during the Bangladesh Liberation War, perpetrated by the Pakistan Armed Forces and the Razakars. It began on 25 March 1971, as Operation Searchlight was launched by West Pakistan to militarily subdue the Bengali population of East Pakistan; the Bengalis comprised the demographic majority and had been calling for independence from the Pakistani state. Seeking to curtail the Bengali self-determination movement, erstwhile Pakistani president Yahya Khan approved a large-scale military deployment, and in the nine-month-long conflict that ensued, Pakistani soldiers and local pro-Pakistan militias killed between 300,000 and 3,000,000 Bengalis and raped between 200,000 and 400,000 Bengali women in a systematic campaign of mass murder and genocidal sexual violence. In their investigation of the genocide, the Geneva-based International Commission of Jurists concluded that Pakistan's campaign involved the attempt to exterminate or forcibly remove a significant portion of the country's Hindu populace.

Bengali Hindus are an ethnoreligious population who make up the majority in the Indian states of West Bengal, Tripura, Andaman and Nicobar Islands, Jharkhand, and Assam's Barak Valley region. In Bangladesh, they form the largest minority. They are adherents of Hinduism and are native to the Bengal region in the eastern part of the Indian subcontinent. Comprising about one-third of the global Bengali population, they are the second-largest ethnic group among Hindus after Hindustani Hindus. Bengali Hindus speak Bengali, which belongs to the Indo-Aryan language family and adhere to Shaktism or Vaishnavism of their native religion Hinduism with some regional deities. There are significant numbers of Bengali-speaking Hindus in different Indian states. According to the census in 1881, 12.81 per cent of Bengali Hindus belonged to the three upper castes while the rest belonged to the Shudra and Dalit castes.