Revanchist

Revanchism (French: revanchisme, from revanche, "revenge") is the political manifestation of the will to reverse the territorial losses which are incurred by a country, frequently after a war or after a social movement. As a term, revanchism originated in 1870s France in the aftermath of the Franco-Prussian War among nationalists who wanted to avenge the French defeat and reclaim the lost territories of Alsace-Lorraine. Revanchist politics often rely on the identification of a nation with a nation state, mobilizing sentiments of ethnic nationalism to claim territories outside of where members of the ethnic group currently live. https://en.wikipedia.org/wiki/Revanchism