What countries were threatened after World War Two with instability owing to the presence of large communist parties?

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After World War Two, both France and Italy faced significant political instability partly due to the strong presence of communist parties within their countries. These parties had gained substantial support due to their resistance efforts against fascism during the war and the appeal of communist ideologies in the post-war economic and social rebuilding phase.

What Countries Were Threatened After World War Two with Instability