 In 1972, a leftist group named the Jatiya Samajtantrik Dal (JSD) was founded from a split in the Bangladesh Chhatra League, the student wing of the Bangladesh Awami League.The JSD, through its armed wing Gonobahini led by Colonel Abu Taher and politician Hasanul Haq Inu, began a political massacre of government supporters, Awami League members, and police.Their campaign contributed to a breakdown of law and order in the country and paved the way for the assassination of Mujib.