During the trial Nelson Mandela married a social worker, Winnie Madikizela, on 14 June 1958. They had two daughters, Zenani and Zindziswa. The couple divorced in 1996.
Days before the end of the Treason Trial Nelson Mandela travelled to Pietermaritzburg to speak at the All-in Africa Conference, which resolved that he should write to Prime Minister Verwoerd requesting a national convention on a non-racial constitution, and to warn that should he not agree there would be a national strike against South Africa becoming a republic. After he and his colleagues were acquitted in the Treason Trial Nelson Mandela went underground and began planning a national strike for 29, 30 and 31 March.
In the face of massive mobilisation of state security the strike was called off early. In June 1961 he was asked to lead the armed struggle and helped to establish Umkhonto weSizwe (Spear of the Nation) which launched on 16 December 1961 with a series of explosions.