During Bangladesh War of Independence the Bangladesh Forces (not to be confused with Mukti Bahini) were divided in the geographical area of Bangladesh into eleven divisions designated as sectors. Each sector had a sector commander I.e. Division Commanders who directed the military operation further coordinated through several sub-sectors under sub-sector commanders who fought along with their troops and civilian resistance fighters. Most of the Sector Commanders and quite a number of sub sector commanders remained in security under Indian BSF border camps such as Major Shafiullah, Major Mir Shawkat Ali, Wing Commander Bashar, Major C R Datta, A. N. M Nuruzaman Quazi, Nooruzzamam.
The history of the Bangladesh liberation war dates back to April 1971 when it began its inception with the title of Bangladesh Forces during the first Bangladesh Sector Commanders Conference held in the week of July 11–17, 1971. It was at this conference during which time BD Forces was organized and formed for the independence struggle. It was significant in the light of its official creation and formation as Bangladesh Forces, its command structuring, sector reorganization, reinforcement and appointing war commanders was its principal focus.
This conference was presided over by the Prime Minister of Bangladesh, Tajuddin Ahmed, and General M.A.G. Osmani, during which General Muhammad Ataul Gani Osmani received his promotion from Colonel and was reinstated from retirement to active duty into the Armed Forces of Bangladesh as its senior most official. General M.A.G. Osmani had thereby been appointed Commander in Chief of all Bangladesh Forces and Group Captain Abdul Karim Khandker, psa appointed as Deputy Chief of Command of all Bangladesh Forces . Principal participants of this conference was Squadron Leader M. Hamidullah Khan, Major Ziaur Rahman, Wing Commander M Khademul Bashar, Major M. A. Jalil, Captain Haider, Lt. Col. Abdur Rab.
The Bangladesh Forces was organized for the war in 1971 into in 11 divisions (sectors) and later 3 indep brigades, under [[BDF]] HQ situated at 8 Theatre Road, Calcutta, West Bengal. Bangladesh interim provincial government of July 11, 1971 appointed Col. M A G Osmani as Commander in Chief. Lt.Col Rab was appointed as Chief of Bangladesh Army Staff. In this meeting, Bangladesh was divided into Eleven Divisions(Sectors) under Sector Commanders.