Answer:
See Explanation.
Step-by-step explanation:
A: The "war" between the US and USSR was known as the Cold War because no actual fighting took place, at least none that we could see. It was a period of will they? won't they? between these two superpowers which could've ended in nuclear destruction.
B: A proxy war is a war in which a major power is backing a smaller state in their own conflict, imagine a boxing ring where the US and USSR are the coaches and smaller nations are the fighters.
C: Two of the most known Proxy wars are the Vietnam war and Korean war, with both parties being backed by the US and USSR similarly.