Minuteman (noun)

1. A member of a group of American colonists who pledged to be ready to fight for independence from Britain at a minute's notice during the American Revolution.
2. A U.S. military member who is trained to be ready to launch a missile in a short amount of time.

Origin:

From the idea of being ready at a minute's notice.

Examples:

1. The minutemen were a crucial part of the American Revolution, serving as an early warning and rapid response force.
2. The minuteman missile system was designed to provide a quick response in the event of a nuclear attack.
3. The story of the minutemen and their role in the American Revolution is an important part of U.S. history.
4. He was proud to serve as a minuteman, ready to defend his country at a moment's notice.
5. The U.S. Air Force operates and maintains the Minuteman III intercontinental ballistic missile system.