This (and most other examples here) could just as easily be explained by nationalism. specifically nationalist projects to claim a much older heritage for the current nation state, to legitimize the current nation, and to give it a glorious and hard fought past so people will be proud of their country.
Personally I think a lot of the idea of countries having existed 'for a long time' is the result of these nationalist projects that all occured in the 1800 hundreds
Personally I think a lot of the idea of countries having existed 'for a long time' is the result of these nationalist projects that all occured in the 1800 hundreds