What do you mean by a state is not subject to external control while a nation may or may not be independent to external control?

A state is a political entity with defined geographic boundaries and a centralized government that exercises authority over its citizens and territory, and is considered not subject to external control. A nation, on the other hand, refers to a group of people who share a common identity, culture, language, or history and may or may not have a state that is independent from external control. Nations can exist within states or across multiple states.