This country was becoming one of most post war superpowers with USA after the world War 2 who was also on the winning side of Allies powers

Answer 1

The country you are referring to is the Soviet Union. After World War II, the Soviet Union emerged as one of the two superpowers, alongside the United States, largely due to its significant military strength, territorial expansion in Eastern Europe, and influence over many countries in the post-war era. The two nations became rivals during the Cold War, shaping global politics for decades.