How After World War 2 most hostility was between?

After World War II, most hostility was primarily between the United States and the Soviet Union, marking the beginning of the Cold War. This ideological conflict was characterized by a struggle between capitalism and communism, leading to proxy wars, nuclear arms races, and intense political rivalry. Additionally, tensions emerged in various regions around the world as countries grAppled with decolonization and the influence of superpowers. The division of Europe into Eastern and Western blocs further exemplified this hostility.