Which major country was NOT a participant in the Seven Years' War?

The United States was not a participant in the Seven Years' War in the same sense as the other countries listed. While the war did take place on North American soil, where it was known as the French and Indian War, the United States did not exist as a country at that time; it was still a collection of British colonies. The war involved major powers like France, Spain, and Russia, which were actively engaged in military operations and political maneuvers during this global conflict. The colonies were certainly affected by the war, and some colonial troops participated, but they did not constitute an independent entity or nation. This distinction is crucial in understanding the context of the war and the nature of participation by the given countries.