revanchist
adj//ɹəˈvɑnt͡ʃɪst//revanschistisk, revanschist
Seeking revenge or otherwise advocating retaliation, especially against a nation which has previously defeated and humiliated the revanchist party in war. Originally referred to the French indignation over losing Alsace-Lorraine to Germany in the Franco-Prussian War.
A revanchist person; occasionally, anyone seeking vengeance.