The Third Amendment
The Third Amendment says in full:
“No Soldier shall, in time of peace be quartered in any house, without the consent of the Owner, nor in time of war, but in a manner to be prescribed by law.”
Most people consider this provision of the Constitution obsolete and unimportant. However, it is worthwhile to note its relevance in the context of the time: citizens remembered having their cities and towns occupied by British soldiers and mercenaries during the Revolutionary War, and they viewed the British laws that required the colonists to house soldiers particularly offensive, to the point that it had been among the grievances listed in the Declaration of Independence.
Today it seems unlikely the federal government would need to house military forces in civilian lodgings against the will of property owners or tenants; however, perhaps in the same way we consider the Second and Fourth amendments, we can think of the Third Amendment as reflecting a broader idea that our homes lie within a “zone of privacy” that government officials should not violate unless absolutely necessary.