| March 27, 1917 | 
Cooperate with local police; take precautions against hostile acts. | 
| April 6, 1917 | 
War declared. Warn Germans to "Obey the law." | 
| April 10, 1917 | 
Advise Germans to surrender all weapons. explosives, and radios; arrest any who do not. | 
| April 16, 1917 | 
Arrest specified enemy aliens and turn them over to War Department for internment. | 
| April 20, 1917 | 
Establish restricted zones around docks, factories, arsenals, etc.; issue passes to specified enemy aliens. | 
| May 23, 1917 | 
Marshals and their Deputies have sole authority to arrest enemy aliens. | 
| May 29, 1917 | 
Protect Selective Service centers; arrest draft evaders or those disrupting selective service. | 
| June 18, 1917 | 
Complete issuance of passes to enter restricted zones and arrest draft resistors by June 30. | 
| July 18, 1917 | 
Locate possible places of detention for large numbers of enemy aliens. | 
| October 8, 1917 | 
Arrest military deserters; assist Bureau of Investigation in locating deserters. | 
| November 28, 1917 | 
Remove all enemy aliens from Washington D.C. and report their arrival in other districts. | 
| December 1, 1917 | 
Arrest all draft dodgers under new Selective Service regulations. | 
| December 17, 1917 | 
Apply enemy alien regulations to citizens of Austria-Hungary. | 
| December 26, 1917 | 
Arrange for registration of all male Germans in cities over 5,000. | 
| December 29, 1917 | 
Prevent possible sabotage to docks and wharves by putting grates over nearby sewers. | 
| December 29, 1917 | 
Begin checking reports from paroled enemy aliens. | 
| January 5, 1918 | 
Compile descriptions of ail enemy aliens arrested. | 
| January 5, 1918 | 
Arrange registration of all enemy alien males at local police stations and post offices between February 4 and 9. | 
| January 12, 1918 | 
Assist enemy aliens in finding employment. | 
| February 4, 1918 | 
Arrest all enemy aliens discharged from American military and recommended for detention by military. | 
| April 6, 1918 | 
Locate enemy aliens who fail to register. | 
| April 15, 1918 | 
Arrest deserters and draft dodgers under new general orders from War Department. | 
| April 25, 1918 | 
Register female enemy aliens. | 
| May 6, 1918 | 
Apply all enemy alien regulations to females. | 
| June 19, 1918 | 
Arrange for speedier transfer of enemy aliens arrested by local police to Marshals. | 
| September 19, 1918 | 
Prohibit enemy alien females from restricted areas unless given a pass by Marshal. | 
| November 11, 1918 | 
Armistice declared. | 
| December 25, 1918 | 
Regulations on enemy aliens lifted. |