Umkhonto we Sizwe

Umkhonto we Sizwe (abbreviated as MK, Zulu for "Spear of the Nation") was the armed wing of the African National Congress (ANC), co-founded by Nelson Mandela in the wake of the Sharpeville massacre. Its founding represented the conviction in the face of the massacre that the ANC could no longer limit itself to nonviolent protest; its mission was to fight against the South African government. After warning the South African government in June 1961 of its intent to resist further acts of terror if the government did not take steps toward constitutional reform and increase political rights, MK launched its first attacks against government installations on 16 December 1961. It was subsequently classified as a terrorist organisation by the South African government and the United States, and banned.

For a time it was headquartered in the affluent suburb of Rivonia, in Johannesburg. On 11 July 1963, 19 ANC and MK leaders, including Arthur Goldreich and Walter Sisulu, were arrested at Liliesleaf Farm, Rivonia. The farm was privately owned by Arthur Goldreich and bought with South African Communist Party and ANC funds, as individuals who were not white were unable to own a property in that area under the Group Areas Act. This was followed by the Rivonia Trial, in which ten leaders of the ANC were tried for 221 militant acts designed to "foment violent revolution". Wilton Mkwayi, chief of MK at the time, escaped during trial.