Answer: irredentist

AnswerCrossword Clue
irredentist(in 19th-century Italian politics) An advocate of the return to Italy of all Italian-speaking districts subject to other countries
irredentistA person advocating the restoration to their country of any territory formerly belonging to it
irredentistone who attempts to recover a region to a country that has lost it
irredentista member of a party in any country advocating the acquisition of some region included in another country.