The government forced citizens to house soldiers during peace or war.
The Third Amendment is the quartering amendment which states the government cannot force citizens to house soldiers without the citizen's consent. This cannot occur during peace or war.
The Third Amendment was inspired by British actions during and after the French-Indian War. The British forced colonists to give soldiers shelter, food, and clothing. Colonists resented the forced burden on their finances. The soldiers were not always good guests and were often disruptive to the families they were forced on.