You mean, like genocide?
If you can't defeat your enemy, destroy his livelihood, his culture, and his source of food and raw materials--and his freedom.
Mountain of buffalo skulls and hunters, mid-19th century.
Of course, if you were one of the hunters, the redskin savages were the bad guys, because they wanted to stop you from earning an honest buck.
Tom, your world is so simple, so straightforward, so cut and dry, so black and white. So American.