The claim is directly supported by a web search result titled 'Unity in Struggle,' which states that 'From the early 20th century, the ANC and SACP found common cause in opposing racial capitalism and colonial rule.' A separate web search result also mentions the struggle was against 'apartheid, colonialism, and racial capitalism.'

The claim is directly supported by a web search result titled 'Unity in Struggle,' which states: 'By the late 1920s, the party had become predominantly African in composition, with figures such as Albert Nzula, Moses Kotane and J.B. Marks at the forefront.'

The claim is corroborated by multiple sources regarding the founding of Umkhonto we Sizwe (MK) and the operational independence of the alliance partners. One source confirms MK was launched as an armed wing of the ANC on December 16, 1961. Another source confirms that the ANC, SACP, and COSATU are 'Each Alliance partner is an independent organisation with its own constitution, membership and programmes.'

The claim is directly supported by a web search result titled 'Unity in Struggle,' which states: 'Their relationship, as articulated in the African Communist journal in 1976, rested on mutual respect for each other’s autonomy.'

The claim is directly supported by a web search result titled 'Unity in Struggle,' which states: 'A defining moment came at the ANC’s 1969 Morogoro Conference, which formalised the alliance’s strategic direction.' This is further supported by multiple sources confirming the conference took place in 1969.

The claim is directly supported by a web search result titled 'Unity in Struggle,' which states: 'The conference affirmed that South Africa’s struggle was national in form but rooted in class realities, with leadership expected from the working class and oppressed African majority.'

The claim is directly supported by a web search result titled 'Unity in Struggle,' which states: 'It also reinforced non-racialism as a core revolutionary principle.'