Right from the beginning, Pakistan was suffering from two binaries. One, the Bengali nationalism that emerged from the Language movement was like a constant threat, and two, the critique of Pakistan’s political economy represented a new kind of ‘Two Nation Theory’. The history and traditions of Bengal were not embodied in the narratives of the Pakistani nation-state. The mental borders made the East Pakistanis ‘minorities’ and made them feel colonized in their own country. The Bengali Muslims thus embarked upon a project that formulated their own narratives that would create a feeling of historical, intellectual and cultural superiority among the Bengali masses. It helped them in rooting their rebelliousness against the oppressive Pakistani state and finally legitimizing their demand for a separate homeland on the basis of their language. As an evident outcome, Pakistan experienced another war of succession in 1971, which by then was inevitable and absolutely unavoidable. Thus, in April 1971, when the Bengalis of East Pakistan were convinced that their state would not offer them any guarantee of security of life, which should be an inalienable right for every citizen, the exodus began in millions in search for safe shelters. IRC Mission, Red Cross, Caritas, Oxfam, World Council of Churches, Ramakrishna Mission, Bharat Sevasram Sangha and other social welfare organizations worked in the refugee camps in bordering areas of West Bengal, Assam, Tripura and Meghalaya. The nature of migration in this phase was diverse in comparison to the earlier ones. In the brief span of seven months (up to the end of October 1971), the influx from East Pakistan was almost 9.5 million to West Bengal, Assam, Meghalaya and Tripura. It was sometimes as high as 102,000 to 57,000 persons per day, and on average 1,600 refugees entered every hour. The Bangladesh War of 1971 was the last blow in the bordering provinces of India. The bordering State of Assam and Tripura suffered immensely in sheltering them. The Indira-Mujib Pact of 1972 signed which stated that migration after March 25, 1971 would be considered illegal. Hence, it marked the end legal migration between both the Bengals. A new era of ‘silent migration’ began since then.