A blunder is a spectacularly bad decision with detrimental consequences to the party that makes it. The term is often used to refer to military, diplomatic, political, or business decisions.
Examples of blunders include:
- British policy toward the United States before the American Revolutionary War
- Decision making prior to World War I
- Mussolini's decision to ally with Hitler and subsequently to invade Greece
- The Japanese attack against Pearl Harbor
- U.S. policy during the Vietnam War