How Did the Cuban Advance Change the Political Situation in South Africa?

An go how did the cuban advance change the political situation in south africa, both in terms of black struggle and power dynamics within the white ruling class. How determinative was cuba's roll in ending apartid ya? I am not knowledgeble enough to really answer this in a serious way. What i can do is to quote nelson mandela. And according to him, it, it was very, very important. This happened at a very particular historical moment. The soviet union, of course, would soon collapse. If it had collapsed sooner, or if the negotiations over angolahad dragged on longer,. then you would have had a romantic situation.