What were the contribution of Oliver tambo in the struggle against apartheid?

Oliver Tambo was a key figure in the anti-apartheid movement in South Africa, serving as the president of the African National Congress (ANC) from 1967 to 1991. He played a crucial role in organizing resistance against apartheid, both domestically and internationally, by advocating for armed struggle and mobilizing global support for the anti-apartheid cause. Tambo's diplomatic efforts helped garner international sanctions against the apartheid regime and promote the ANC as the legitimate representative of the South African people. His leadership and vision were instrumental in uniting various factions within the struggle and ultimately contributed to the eventual dismantling of apartheid.