About Oliver Tambo
Oliver Reginald Kaizana Tambo was a South African anti-apartheid politician and activist who served as President of the African National Congress (ANC) from 1967 to 1991. In 1944, along with Nelson Mandela, and Walter Sisulu, Tambo founded the ANC Youth League, with Tambo becoming its first National Secretary and a member of the National Executive in 1948. When he stepped down as president, however, the congress created a special position for him as the National Chairman. In 1955, Tambo became Secretary-general of the ANC after Sisulu was banned by the South African government under the Suppression of Communism Act. In 1967, Tambo became Acting President of the ANC, following the death of Chief Albert Luthuli.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.