I want to know the answer to the following question:
Who ignored the direct participation of the Soviet Union to prevent expanding the Korean War to the Soviet Union?
All the background I'm provided with is that "Fearful of confronting the United States directly, the Soviet Union denied involvement of their personnel in anything other than an advisory role, but air combat quickly resulted in Soviet pilots dropping their code signals and speaking over the wireless in Russian.". Is that enough to answer the question?