The Sphere of Influence is a concept where a state, an organization or a group has a strong cultural, military, economic or political strength and influence in an area around it or beyond its borders. Because of this "Sphere of Influence", a state, an organization or a group can accommodate its interest in places beyond a certain border of a state. An example of a sphere of influence is the United States of America's sphere of influence in Asia that currently exists in South Korea, Japan and the Philippines - on which you can say - an extension of US power in Asia-Pacific Region.
