There are wars of anihilation. Some brief, pehaps punitive. Others inspired by historical emnity, opportunism, vengence, manifest destiny (OK, that one was land

or finally Doctrinal.
To run through them with the intent not to bore.
Carthage. Plough salt.
Vikings. Rape it, steal it; and if not kill or burn it. I know that they eventualy settled etc.
See top. Or the opening weeks of WW2. Or the closing months of WW2
Anything in Chinese history.
To wind things up: MAD
Nothing left to claim, Well, for a few centuries ...
