Douglas Harper's Etymology Dictionary
"a German seeking to avenge Germany's defeat in World War I and recover lost territory," 1926 (on model of French revanchiste, used in reference to those seeking to reverse the results of the defeat of France by Prussia in 1871), from revanche "revenge, requital," especially in reference to a national policy seeking return of lost territory, from French revanche "revenge," from Middle French revenche, back-formation from revenchier (see revenge (v.)). Related: Revanchism (1954).
Wiktionary
a. 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. n. A revanchist#Adjective person; occasionally, anyone seeking vengeance.
Usage examples of "revanchist".
It has been reported that our passenger manifest includes a pair of individuals belonging to a terrorist group identified with revanchist Muscovite nationalism.
Hitler was too revanchist in his attitude toward Versailles, and Germany too potentially powerful, for there not to be strong ambivalence toward this latest anti-Communist saviour.
All this effort, the efforts of East and West to bring about a just and lasting peace, have been brought to ruin by a handful of revanchist men who have not taken the lessons of the Second World War to heart.
Finally, we demand and expect that full reparations be paid to the government of the Soviet Union, and to the families of those so callously murdered by the revanchist German nationalists who hide in their city on the west bank of the Rhein.
I could have made other charges--that he passed information to the British Secret Service, that he turned his Department into the unconscious lackey of a bourgeois state, that he deliberately shielded revanchist anti-Party groups and accepted sums of foreign currency in reward.
As soon as the Revanchists had consolidated their power, he was stripped of his commission.