leader, Meraj fell into political isolation and he never regained his position as a representative leader of working class, a position he enjoyed once. Afghan saur revolution NSF saw another split in the 1980s when the USSR invaded Afghanistan. A majority faction condemned the soviet invasion, believed that revolution can not be exported. It was said that this will provide opportunity to imperialist powers to use religious extremist to curb progressive movements. Within Afghanistan various Marxist parties and groups were also divided over the issue. The small faction headed by Zahid Hussain took the position that criticizing so called 'Afghan saur revolution' would meant to be supporting the Mujahideen and see this as support to the Army Junta and dictatorship of General Zia-ul-Haq, playing into the hands of the US. That gave birth to a small dissident group headed by Zahid Hussain. This faction liquidated soon and member of this faction later joined various pro soviet groups or took positions in establishment. These Opportunist wolves in sheeps’s clothing done damage to NSF in particular and to the progressive and workers movement in general. Their position on this issue demonstrated that they failed to understand the imperialist strategy and their grasp of Marxism–Leninism-Mao Zedong Thought was fairly shallow. Revisionism and opportunism is always the main danger and obstacle to the advance of progressive movement. Both betrayals from inside and the state crack down from outside were great setback to NSF and helped NSF's arch rivals, the right-wing, Islami Jamiat-e-Talaba (IJT), the student wing of the Jamaat-e-Islami, gain ground in the many student union elections held in the country's campuses in the 1970s and the 1980s. Till then the NSF had been sweeping student union elections in the 1950s, 1960s and 1970's. NSF was also affected by the creation of the Pakistan Peoples Party's student wing, the Peoples Students Federation (PSF) whose main purpose was to counter the NSF opposition to PPP in the early 1970s. Ban on students' unions Left leaning and progressive parties were persecuted and harassed by the right-wing dictatorship of President General Muhammad Zia-ul-Haq in the 1980s, dozens of NSF activists were arrested, tortured and expelled from the campuses. NSF joined alliance of progressive student parties that included DSF, PSF and many secular nationalist student groups like Baloch Students Federation in students' union elections across the country. NSF gained significant victories in students unions elections before they were