Revanche:
the policy of a state intent on regaining areas of its original territory that have been lost to other states as a result of war, a treaty signed under duress, etc. [Dictionary.com]
A related word noted in “Condemn the White Supremacists, Mr. President,” National Review:
This is somewhat awkward for President Trump because the cracked and malevolent young men raging about “white genocide” are his people, whether he wants them or not. Let us be clear about what we mean by that: President Trump obviously has defects and shortcomings as a political leader, but we do not believe for a second that those failures include a sneaking anti-Semitism or a secret taste for neo-Confederate revanchism. At the same time, he has made common cause with those who have flirted with those elements for political and financial gain.
