The Sungusungu were started in 1981 by Sukuma and Nyamwezi communities in order to deal with cattle theft.[3][4] While they were initially developed as a focused network of actors communicating with other communities whenever thefts occurred, they quickly developed into formal organizations hearing allegations of wrongdoing, setting punishment, and punishing those found guilty.[4]
Their name is often taken to be a reference to the Swahili word sungusungu which refers to a local species of army ants.[4] Human Rights Watch notes that the term "initially used to refer to a vigilante group formed to combat cattle rustling in western Tanzania in the 1980s; more recently, the term has come to be used to describe any neighborhood militia."[2]
The groups were outside the government system until reforms in the late 1980s and early 1990s legalized their existence and gave them the ability to detain and try criminals.[1] They are sometimes used by the government to perform specific law enforcement tasks. In 2001, the Sungusungu were used to escort 3,000 Ugandans who had been living in Tanzania to the border.[5]
In recent years, they have been accused of a number of human rights abuses. The group was blamed by Maasai herders in Kilosa District for fueling violence between the Maasai and farmers in the region in 2000. The violence was reported to have caused at least 30 deaths.[6] They have been accused of murdering criminals without a legal trial and individuals accused of witchcraft.[7]