Third Amendment to the United States Constitution

The Third Amendment (Amendment III) to the United States Constitution places restrictions on the quartering (mandatory housing) of soldiers in private homes without the owner's consent, forbidding the practice in peacetime. The amendment was a response to the Quartering Acts passed by the Parliament of Great Britain during the buildup to the American Revolutionary War, which had allowed the British Army to lodge soldiers in public buildings.

Source: Wikipedia — Third Amendment to the United States Constitution (CC BY-SA 4.0)