Umkhonto we Sizwe
Umkhonto we Sizwe (English: Spear of the Nation), was a guerilla movement created in 1961 by Nelson Mandela, Walter Sisulu and other people from the African National Congress. It was created when the government started killing and hurting people that protested against the apartheid. Nelson Mandela first wanted to free South Africa without violence, but the government created laws to prevent that. Mandela then decided that if the black people did not use violence, they would never regain their rights.
Umkhonto we Sizwe stopped being active a bit before the end of the apartheid, in 1991.