War

During a time of war, the U.S. government may properly compel the services of all its citizens and subjects. It can recall nationals who are abroad and subject them to penalty if they do not obey. The government can take steps it deems necessary for national security against enemy ALIENS. Enemy aliens residing in the United States at the outbreak of a declared war or who enter the United States during a war are properly subject to arrest, detention, internment, or deportation.