irredentist

noun

1. Someone who calls for the seizure or recovery of territories or states currently subject to other countries; an adherent of irredentism.

   “As the assassination of Sadat proved, the Arab irredentists, like the Zionist ultras, have always been unerring in picking off any incipient mediators.”

2. (historical)A member or supporter of the Italian party after 1878 which called for the recovery of all Italian-speaking territories subject to other countries.

adj

1. Of or relating to irredentists or their policies.

   “In 1885, a Bulgarian irredentist movement seized control of neighbouring Ottoman-ruled Eastern Roumelia and announced the creation of a Greater Bulgaria.”