advocacy of or support for the political independence of a particular nation or people
whats a nation state
A nation state is a state in which a great majority shares the same culture and is conscious of it. The nation state is an ideal in which cultural boundaries match up with political boundaries. Wikipedia
Why is history important to the nation?
Studying history allows us to observe and understand how people and societies behaved. For example, we are able to evaluate war, even when a nation is at peace, by looking back at previous events. History provides us with the data that is used to create laws, or theories about various aspects of society