Amendment 3

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.

This information from: http://constitutioncenter.org/constitution/the-amendments/amendment-3-quartering-of-soldiers

This amendment is important so people feel that their homes are theirs and that the government can not just come in and take over the space with soldiers.