of Pakistani forces on December 16, 1971. The table below provides a list of the BDF sectors along with the area under each of them, the names of the BDF commanders of 11 sectors and sub-sectors. The 10th BDF Sector was directly placed under Commander in Chief and included the Naval Commandos and C-in-C's special force. These commandos were later absorbed into the Bangladesh Navy. BDF Commanders directed the guerrilla warfare against West Pakistani forces. Indian participation The Bangladesh Forces (BDF) received assistance from the Indian authorities soon after hostilities started. On November 21, 1971, The Indian Army entered Bangladesh through air and land. The Pakistani forces morally broken and militarily devastated by the BD Forces, agreed to a cease fire without defiance in about one and a half weeks, on December 16, 1971. The cease fire was switched to a surrender document by the Indian government which the Commanding General of the Pakistan Army Eastern Command signed reluctantly. Victory was declared by the Indian authorities and all prisoners of war including combat material were taken to India. Bangladesh Forces were ordered for complete sector close down and demobilization on January 29 by end of March 1972 under the direction of General M.A.G Osmani in final Sector Commanders Conference held at the old Police HQ at 27 Old Mintu Road, Dhaka. All BDF sector Commanders along with C-in-C BDF Gen. M.A.G. Osmani transferred from their posts to respective services. The first government of Bangladesh was formed on 10 April 1971.They took an oath on 17 April 1971. List of sectors and subsectors List of Brigade Formations Z Force, commanded by Lt. Col. Ziaur Rahman, consisted of 1, 3 and 8 East Bengal Regiment. Brigade Major - Captain Oli Ahmad D-Q Officer – Captain Sadeque Brigade Medical Officer - Dr. H K M Abdul Hye 1st East Bengal Regiment – CO – Major Mohammad Ziauddin. 1st East Bengal Regiment's Senior Officer Major Ziauddin was appointed as CO on 12 August 1971 after the operational attack on Pakistan Army BOP at Kamalpur took place on 31 July 1971 under BDF Sector 11. - Battalion Adjutant/Quartermaster: Flight Lieutenant Liaqat Ali Khan 'Alpha' Company Commander: Captain Mahbubur Rahman 'Bravo' Company Commander: Captain Hafiz Uddin Ahmad 'Charlie' Company Commander: Captain Salauddin Mumtaz Acting Company Commander – Second Lieutenant Anisur Rahman Acting Platoon Commander – Second Lieutenant Wakar Hassan 3rd East Bengal Regiment – CO :