Angola 1975–76: Did Soviet and Cuban Intervention Decide the War?
You are writing a document-based question on the Cold War in southern Africa. The question is: 'How important was Soviet and Cuban intervention in deciding the outcome of the Angolan civil war in 1975–76?' Source A is a US State Department memorandum from November 1975: it warns that Soviet arms and Cuban troops are tipping the balance against the FNLA and UNITA and recommends increased covert support. Source B is an MPLA communiqué from March 1976: it thanks the Soviet Union and Cuba for internationalist solidarity and says the victory was won by the Angolan people. Source C is a South African defence force report from January 1976: it says that its withdrawal was caused by logistics and international pressure, not by Cuban troops alone. A student writes: 'Source B proves that Cuba won the war; Source A proves the US lost it.' The exam requires you to evaluate the sources and reach a judgement about importance, not just blame.
1. Evaluate the student's use of Sources A and B to prove that Cuba won the war and the US lost it.
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Reasoning
Source B does not prove that Cuba won the war. It is an MPLA communiqué, written after victory, and its purpose is to thank allies while asserting Angolan agency. The phrase that victory was won by the Angolan people is not mere decoration: it protects the MPLA's legitimacy and limits the claim that outsiders decided the outcome. The communiqué is useful evidence of the alliance and of gratitude, but not a neutral measurement of causation.
Source A is a US State Department memorandum from November 1975. Its purpose was to justify increased covert support, so it had an interest in presenting Soviet and Cuban action as decisive and urgent. It is useful for timing and for showing how US officials perceived the balance, but it cannot prove that the US lost because of Cuba alone.
A strong answer would treat both sources as interested. Source A shows that external intervention mattered to contemporaries; Source B shows that the MPLA wanted to own the victory. Neither proves the counterfactual that the MPLA would have lost without Soviet and Cuban help. Source C is needed to test whether South African withdrawal was caused by Cuban troops or by other pressures.
2. Source C says South African withdrawal was caused by logistics and international pressure, not by Cuban troops alone. How does this affect the argument that Soviet and Cuban intervention was decisive?
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Assessing Source C
Source C is a South African defence force report from January 1976. Its provenance matters: a military report may downplay the role of an enemy that forced a withdrawal, and it may emphasise logistical and political constraints that protect institutional reputation. Its claim that Cuban troops were not the sole cause should therefore be treated cautiously.
But the claim is still useful. It identifies other factors: distance from South African bases, the difficulty of supplying a long campaign, and international pressure against the invasion. These factors limit any simple argument that Cuban troops alone decided the outcome. If South African forces were already overstretched and diplomatically isolated, Cuban intervention may have accelerated a withdrawal that had other causes.
The best use of Source C is to refine the judgement rather than reject it. Soviet and Cuban intervention can be decisive in the military balance without being the sole cause of the result. A strong essay would distinguish between tipping the balance on the battlefield and causing the political outcome, and would use Source A for external perception, Source B for alliance politics, and Source C for the limits of Cuban explanations.
3. Write a judgement paragraph answering the question. Use all three sources and explain why the sources cannot be simply ranked.
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Judgement
Soviet and Cuban intervention was highly important in deciding the military outcome in 1975–76, but it was not the sole cause of MPLA victory. Source A shows that US officials believed Soviet arms and Cuban troops were tipping the balance, which is strong evidence that the intervention changed the battlefield. Source B confirms the MPLA's dependence on Soviet and Cuban solidarity, even while it insists that Angolans won the victory. Source C limits the claim: South African withdrawal was also driven by logistics and international pressure, so Cuban troops did not act alone.
The sources cannot be ranked simply as reliable or biased. Each was written for a different purpose: US policy justification, MPLA legitimation, and South African military explanation. Their value lies in what they reveal about perceptions and constraints. A balanced judgement is that Soviet and Cuban intervention was decisive in the narrow military sense of preventing the FNLA and UNITA from taking Luanda, but it worked alongside MPLA political organisation, South African overextension, and wider international pressure. The intervention mattered greatly; it did not act in a vacuum.