Where did you get that from? In 1876, the US Federal Government appeased Southern whites by allowing black civil rights to go unenforced, and no-one lost out except the blacks themselves. The Southerners certainly didn’t try to re-secede from the Union or re-introduce slavery.

In the 1920s the British and French appeased Turkish dictator Kemal Ataturk, at the expense of the Greeks and the Kurds. The West has never had any trouble with Turkey since, except for one very minor dispute over Cyprus.

Hitler was the exception, not the rule. Appeasement is like treason – it “doth never prosper” for when it does, none dare call it appeasement.