Abu Osman Chowdhury Abu Osman Chowdhury is a Bangladeshi war hero and freedom fighter . During the Bangladesh Liberation War , he served as Commander of Sector 8 of the Bangladesh Forces . Bangladesh liberation war . In 1971 , Abu Osman Chowdhury was posted in Kushtia as a Major of the Pakistan army and the Commander of 4th Wing East Pakistan Rifles ( EPR ) . He was in close contact with the Awami League local underground leaders . When the news of Operation Searchlight reached him in the afternoon of 26 March , he revolted along with his fellow Bengali soldiers and raised the flag of Bangladesh at 4 Wing Quarter of Jessore Cantonment . The 4 wing of EPR , led by Major Chowdhury and reinforced with Police and Ansar personnels and local youth , attacked 27 Baluch of Pakistan Army stationed at Chuadanga and Kushtia and eliminated almost 2 companies . In the first sector commander ' s conference in July , Major Abu Osman Chowdhury was appointed the commander of the western sector , which comprised Kushtia , Jessore , areas of Faridpur , including Doulatpur - Satkhira Road encompassed within Khulna . East Pakistan Rifles ( EPR ) , the border security force , played an important role in our liberation war . It was past noon of 26 March when Major Abu Osman Chowdhury reached his Wing headquarters at Chuadanga . There , his NCOs briefed him of the overall situation including formal organisation of local resistance in the wake of he crackdown at Dhaka . In the meantime Dr Ashab Ul Haq had contacted him over telephone and invited him to an emergency meeting with the public leaders and representatives of the local administration . At the meeting Major Osman was asked totake charge of the armed resistance force that he accepted at once . After a longdiscussion the first ever war command of Bangladesh , named South Western Command , was formed on 26 March 1971 in Chuadanga . While Major Abu OsmanChowdhury was given the position of the Commander , Dr Ashab Ul Haq , MPA becamethe Chief Advisor and Barrister Abu Ahmed Afzalur Rashid alias Badal Rashid , MNAand Advocate Yunus Ali , MPA were made Deputy Chief Advisors . The whole of western region of the Padma was taken under the command comprising that of Kushtia , Faridpur , Jessore , Khulna and Barisal districts . All the armed personnel from defence , EPR , Police , Ansar , Mujahid and armed student wing of the area were vested under theCommand . The newly built District Council Dak Bungalow was made the Command Headquarter . The next day on 27 March at about noon the Pakistani flag , last flying oneat the EPR Wing headquarter was ceremoniously lowered and the tri - colour Bangladeshflag was hoisted at the flag post by Major Osman . Captain A R Azam Chowdhury , his deputy , was there who after wards played valiant role under the Command . Major Osman held the position till division of Bangladesh war commands into 11 Sectors by the Provisional Government on 11 July 1971 . The South Western Command was then renamed Sector - 8 with some revision of the command area and Major Osman continued to hold the position of the Sector Commander till Major M Abul Manjur took over in September 1971 . On 7 November morning , 1975 during " Sepoy Biplob " ; the Bangladesh Army went to Abu Osman Chowdhuy ' s residence at Gulshan to kill him . Unable to find Abu Osman Chowdhury , those criminals killed his wife . At the same time other killer group went to Sher e Bangla Nagar and killed sector commander Khaled Musharraf , K , N , Huda and Col Hyder . References . http : / / www . scribd . com / doc / 58669955 / Chuadanga - The - Unsung - Tale - of - Bangladesh - Liberation - War মুক্তিযুদ্ধের অজানা তথ্যঃ নাজমুল আহসান শেখ