| Austria against Japan | Aug. 26, 1914 |
| Austria against Portugal | March 15, 1916 |
| Austria against Serbia | July 26, 1914 |
| Austria against United States | April 8, 1917 |
| Belgium against Turkey | Oct. 30, 1914 |
| Bolivia against Germany | April 14, 1917 |
| Brazil against Germany | April 11, 1917 |
| China against Germany | March 14, 1917 |
| Costa Rica against Germany | Sept. 21, 1917 |
| Ecuador against Germany | Dec. 7, 1917 |
| Egypt against Germany | Aug. 13, 1914 |
| France against Austria | Aug. 11, 1914 |
| France against Turkey | Oct. 30, 1914 |
| Germany against Italy | May 23, 1915 |
| Great Britain against Turkey | Oct. 30, 1914 |
| Greece against Austria | July 2, 1917 |
| (Government of Alexander) | |
| Greece against Turkey | July 2, 1917 |
| (Government of Alexander) | |
| Guatemala against Germany | April 27, 1917 |
| Haiti against Germany | June 16, 1917 |
| Honduras against Germany | May 17, 1917 |
| Japan against Austria | Aug. 25, 1914 |
| Liberia against Germany | May 8, 1917 |
| Nicaraugua against Germany | May 19, 1917 |
| Peru against Germany | Oct. 5, 1917 |
| Rumania against Bulgaria | Aug. 30, 1916 |
| Russia against Bulgaria | Oct. 19, 1915 |
| Russia against Rumania | Jan. 28, 1918 |
| Russia against Turkey | Oct. 30, 1914 |
| Santo Domingo against Germany | June 8, 1917 |
| Turkey against United States | April 20, 1917 |
| United States against Germany | Feb. 3, 1917 |
| Uruguay against Germany | Oct. 7, 1917 |
-Compiled from the Official United States Bulletin and Current History. SBBS 580.1