50 US Code Sec 21 #Restraint #Regulation & #Removal Whenever there #declared #war between #US & any #foreign #nation or #government, or any #invasion or #predatory #incursion is perpetrated, attempted, or threatened against #territory of US by any foreign #nation or #government, President makes public proclamation of event, all natives, citizens, denizens, or subjects of hostile nation govt who shall be within US not actually naturalized, shall removed as alien #enemies. https://www.law.cornell.edu/uscode/text/50/21