Walter Max Ulyate Sisulu was a South African anti-apartheid activist and member of the African National Congress (ANC). Between terms as ANC Secretary-General (1949–1954) and ANC Deputy President (1991–1994), he was Accused No.2 in the Rivonia Trial and was incarcerated on Robben Island where he served more than 25 years' imprisonment for his anti-Apartheid revolutionary activism. He had a close partnership with Oliver Tambo and Nelson Mandela, with whom he played a key role in organising the 1952 Defiance Campaign and the establishment of the ANC Youth League and Umkhonto we Sizwe. He was also on the Central Committee of the South African Communist Party.

Internal resistance to apartheid in South Africa originated from several independent sectors of South African society and took forms ranging from social movements and passive resistance to guerrilla warfare. Mass action against the ruling National Party (NP) government, coupled with South Africa's growing international isolation and economic sanctions, were instrumental in leading to negotiations to end apartheid, which began formally in 1990 and ended with South Africa's first multiracial elections under a universal franchise in 1994.