subnationalism
/sʌbˈnaʃ(ə)nəlɪz(ə)m/ /sʌbˈnaʃ(ə)n(ə)lɪz(ə)m/ /sʌbˈnaʃən(ə)lɪz(ə)m/noun
Advocacy of or support for the interests of a subnation or subnations, as distinguished from those of the nation as a whole.
Origin
Late 19th century. From sub- + nationalism, after subnation, subnational.