UMkhonto we Sizwe in the context of South African National Defence Force

Nelson Rolihlahla Mandela (/mænˈdɛlə/ man-DEL-ə, Xhosa: [xolíɬaɬa mandɛ̂ːla]; born Rolihlahla Mandela; 18 July 1918 – 5 December 2013) was a South African anti-apartheid activist and statesman who was the first president of South Africa from 1994 to 1999. He was the country's first Black head of state and the first elected in a fully representative democratic election. His administration focused on dismantling the legacy of apartheid by fostering racial reconciliation and a multiracial democracy. Ideologically an African nationalist and socialist, he served as the president of the African National Congress (ANC) party from 1991 to 1997.

A Xhosa, Mandela was born into the Thembu royal family in Mvezo, South Africa. He studied law at the University of Fort Hare and the University of Witwatersrand before working as a lawyer in Johannesburg. There he became involved in anti-colonial and African nationalist politics, joining the ANC in 1943 and co-founding its Youth League in 1944. After the National Party's white-only government established apartheid, a system of racial segregation that privileged whites, Mandela and the ANC committed themselves to its overthrow. He was appointed president of the ANC's Transvaal branch, rising to prominence for his involvement in the 1952 Defiance Campaign and the 1955 Congress of the People. He was repeatedly arrested for seditious activities and was unsuccessfully prosecuted in the 1956 Treason Trial. Influenced by Marxism, he secretly joined the banned South African Communist Party (SACP). Although initially committed to non-violent protest, in association with the SACP he co-founded the militant uMkhonto we Sizwe in 1961 that led a sabotage campaign against the apartheid government. He was arrested and imprisoned in 1962, and, following the Rivonia Trial, was sentenced to life imprisonment for conspiring to overthrow the state.

The presidency of Nelson Mandela began on 10 May 1994, when Nelson Mandela, an anti-apartheid activist, leader of uMkhonto we Sizwe, lawyer, and former political prisoner, was inaugurated as President of South Africa, and ended on 14 June 1999. He was the first non-White head of state in the history of South Africa, taking office at the age of 75. His age was taken into consideration as part of his decision to not seek re-election in 1999.

The Rivonia Trial was a trial that took place in apartheid-era South Africa between 9 October 1963 and 12 June 1964, after a group of anti-apartheid activists were arrested on Liliesleaf Farm in Rivonia. The farm had been the secret location for meetings of uMkhonto we Sizwe (MK), the newly-formed armed wing of the African National Congress. The trial took place in Pretoria at the Palace of Justice and the Old Synagogue.

Men who were convicted and sentenced to prison for their activities included Nelson Mandela, Walter Sisulu, Govan Mbeki, Ahmed Kathrada, Denis Goldberg, Raymond Mhlaba, Elias Motsoaledi, Andrew Mlangeni. Many were convicted of sabotage and sentenced to life.