Assassination of Sheikh Mujibur Rahman in 1975
What happened in Bangladesh in 1975?
25 January: The fourth amendment of constitution abolishes parliamentary system and establishes presidential system. 
25 February: Establishment of Bangladesh Krishak Sramik Awami League (BAKSAL) led by Mujib as the single legitimate political party. 
15 August - Sheikh Mujibur Rahman is assassinated.