and the military. In the years to come, federal governments switched between forming alliance with MQM and fighting against it to establish greater control over Karachi. From 1992 to 1994, the MQM was the target of the Pakistan Army's Operation Clean-up, The period is regarded as the bloodiest period in Karachi's history, with thousands MQM Leaders/workers and supporters killed or gone missing. Although more than 20 years have passed since the alleged arrest or disappearance of MQM workers, families of the missing people are still hopeful after registering the cases in the Supreme Court of Pakistan. The operation left thousands of Muhajir civilians dead. The violence gripped urban Sindh politics in the late 1980s after General Zia ul-Haq's era, and finally in 1992, the erstwhile government of Prime Minister Nawaz Sharif passed a resolution in assembly to launch a military operation in Karachi to target 72 'big fishes'. The federal government gave the reasoning behind this operation, known as "Operation Clean-up", as the government's attempt to end terrorism in Karachi and to seize unauthorized arms. Operation Clean-Up, which ostensibly sought to eliminate all terrorists irrespective of their political affiliation, began in June 1992. MQM perceived this operation as an attempt to wipe out the party altogether. Political violence erupted while MQM organized protests and strikes. The resulting lawlessness prevailed in the largest metropolitan city of Pakistan, which led to the country's president dissolving the National Assembly. During the 1992 violence Saeed Bharam left the country when a warrant was issued for him in connection with a murder. Since then, the political party is run by Mr Bharam, from self-imposed exile in London. MQM boycotted the subsequent 1993 general elections claiming organized military intimidation but participated in provincial elections. MQM secured 27 seats in provincial assembly, in comparison to its political rival PPP which won 56 seats. This resulted in PPP forming both the provincial and federal governments. Whereas, MQM Haqiqi failed to gain any seats at federal or provincial level. Political violence gained momentum in 1993 and 1994. During the 1994 violence, heavily political killings were reported between MQM, MQM factions, and Sindhi nationalist groups. By July 1995, more than 1,800 people had been assassinated in Karachi. In 1997, MQM boycotted the general elections and officially changed the previously maintained name 'Muhajir' to 'Muttahida'(). Accusations of violence In the mid-1990s, MQM created widespread political violence that affected Pakistan's Sindh province,