Of the portions of Europe that became communist post-WWII, the countries most accessible to western military power during the war were Albania, Yugoslavia, Bulgaria and Czechoslovakia. The former three countries were near allied theaters of operations in the Mediterranean, and Prague could have been put within military reach after D-Day. However, these were the very same countries that had the strongest native communist parties and pro-Soviet popular and elite sentiments. Even of liberated by the western allies, their local communist parties would have been powerful, much more so than say the Italian or French communist parties, and they, along with other non-communist elite elements, would have resisted participation in anti-Soviet alliances.
To elaborate, by 1943 communists were the dominant resistance group in Yugoslavia, and even more dominant, relative to other groups, in Albania. A pre-Cold War example of Bulgarian pro-Sovietism was its refusal to declare war on the USSR. Just prior to the German invasion, royalist Yugoslavia was expanding ties with the USSR, to give another example of non-communist pro-Sovietism. Benes, remembering Munich bitterly, made up his mind by mid-1942 that Czechoslovakia should place its principal reliance for security
on the USSR after the war. He had been fairly pro-Soviet before the war also, although also allied with France.
Those countries with more anti-Soviet or anti-communist native sentiment, weak communist parties and with the greatest corresponding interest in western alliances were the Baltics, Poland, Romania and Hungary. However, they were all relatively geographically inaccessible to western allied forces during the war, being the most distant from Atlantic and Mediterranean invasion routes.
To elaborate, by 1943 communists were the dominant resistance group in Yugoslavia, and even more dominant, relative to other groups, in Albania. A pre-Cold War example of Bulgarian pro-Sovietism was its refusal to declare war on the USSR. Just prior to the German invasion, royalist Yugoslavia was expanding ties with the USSR, to give another example of non-communist pro-Sovietism. Benes, remembering Munich bitterly, made up his mind by mid-1942 that Czechoslovakia should place its principal reliance for security
on the USSR after the war. He had been fairly pro-Soviet before the war also, although also allied with France.
Those countries with more anti-Soviet or anti-communist native sentiment, weak communist parties and with the greatest corresponding interest in western alliances were the Baltics, Poland, Romania and Hungary. However, they were all relatively geographically inaccessible to western allied forces during the war, being the most distant from Atlantic and Mediterranean invasion routes.