Question: short note on causes of separation of east pakistan

title: East Pakistan
text: Sheikh Mujibur Rahman made a declaration of independence at Dacca on 26 March 1971 . All major Awami League leaders including elected leaders of National Assembly and Provincial Assembly fled to neighbouring India and an exile government was formed headed by Mujibur Rahman . While he was in Pakistan Prison , Syed Nazrul Islam was the acting president with Tazuddin Ahmed as the prime minister . The exile government took oath on 17 April 1971 at Mujib Nagar , within East Pakistan territory of Kustia district and formally formed the government . Colonel MOG Osmani was appointed the Commander in Chief of Liberation Forces and whole East Pakistan was divided into eleven sectors headed by eleven sector commanders . All sector commanders were Bengali officers who had defected from the Pakistan Army . This started the Bangladesh Liberation War in which the freedom fighters , joined in December 1971 by 400,000 Indian soldiers , faced the Pakistani Armed Forces of 365,000 plus Paramilitary and collaborationist forces . An additional approximately 25,000 ill - equipped civilian volunteers and police forces also sided with the Pakistan Armed Forces . Bloody guerrilla warfare ensued in East Pakistan .