Liberia against Germany, Aug. 4, 1917.
Montenegro against Austria, Aug. 8, 1914.
Montenegro against Germany, Aug. 9, 1914.
Nicaragua against Germany, May 24, 1918.
Panama against Germany, April 7, 1917.
Panama against Austria, Dec. 10, 1917.
Portugal against Germany, Nov. 23, 1914. (Resolution passed authorizing military intervention as ally of England.)
Portugal against Germany, May 19, 1915. (Military aid granted.)
Roumania against Austria, Aug. 27, 1916. (Allies of Austria also consider it a declaration.)
Russia against Germany, Aug. 7, 1914.