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Spheres of influence is a collection of allying regions or countries that are under the rule of a certain nation or organization. The ruler has economic, political, and to even some extent, cultural influence over the regions that are under them. The rulers usually have strong military power which enables them to control the regions under them. A very good example would be the Greater East Asia Co-Prosperity Sphere wherein the Japanese rule over certain Asian countries like Korea, some countries in South Eas Asia, and even China.