Buffer states refer to countries that exist between two or more hostile countries, serving as a barrier between them to minimize direct conflicts. These states may be demilitarized or have neutral political affiliations or alliances to reduce the risk of aggression. Some synonyms for buffer states include "neutral states," "intermediate states," "cushion states," or "barrier states." These states play a critical role in the preservation of peace and stability within regions plagued by friction, such as North and South Korea. Countries that have served as buffer states in the past include Mongolia, Finland, and Switzerland, providing valuable examples of success in this diplomatic strategy.