What are some examples of Spheres of Influence for the US?

Spheres of influence for the U.S. include regions where it exerts significant political, economic, and military influence. For example, in Latin America, the U.S. has historically exercised influence through policies like the Monroe Doctrine and various trade agreements. In East Asia, the U.S. maintains a strong presence through alliances with countries such as Japan and South Korea. Additionally, NATO represents a sphere of influence in Europe, where the U.S. plays a key role in regional security and defense cooperation.