(from the Funk & Wagnalls New Encyclopaedia, 1983, Volume 27, p 418)
Austria-Hungary
- Declared war on Serbia July 28, 1914
- Declared war on Russia Aug 6, 1914
- Declared war on Belgium Aug 28, 1914
- Declared war on Portugal March 15, 1916
Belgium
- Refused ultimatum demanding permission for German troops to cross Belgium Aug 2, 1914
- Invaded by Germany Aug 3-4, 1914
Bolivia
- Severed relations with Germany April 13, 1917
Brazil
- Severed relations with Germany April 11, 1917
- Declared war on Germany Oct 26, 1917
Bulgaria
- Declared war on Serbia Oct 14, 1915
- Declared war on Romania Sept 1, 1916
China
- Severed relations with German March 14, 1917
- Declared war on Germany Aug 14, 1917
- Declared war on Austria-Hungary Aug 14, 1917
Costa Rica
- Severed relations with Germany Sept 21, 1917
- Declared war on Germany May 23, 1918
Cuba
- Declared war on Germany April 7, 1917
Ecuador
- Severed relations with Germany Dec 8, 1917
France
- Invaded by Germany Aug 2, 1914
- Declared war on Austria-Hungary Aug 12, 1914
- Declared war on Turkey Nov 5, 1914
- Declared war on Bulgaria Oct 16, 1915
Germany
- Declared war on Russia Aug 1, 1914
- Declared war on France Aug 3, 1914
- Declared war on Belgium Aug 4, 1914
- Declared war on Portugal March 9, 1916
Great Britain
- Declared war on Germany Aug 4, 1914
- Declared war on Austria-Hungary Aug 12, 1914
- Declared war on Turkey Nov 5, 1914
- Declared war on Bulgaria Oct 15, 1915
Greece
- Declared war on Austria-Hungary, Bulgaria, Germany and Turkey June 27, 1917
Guatemala
- Declared war on Germany April 23, 1918
Haiti
- Declared war on Germany July 12, 1918
Honduras
- Declared war on Germany July 19, 1918
Italy
- Declared war on Austria-Hungary May 23, 1915
- Declared war on Turkey Aug 21, 1915
- Declared war on Bulgaria Oct 19, 1915
- Declared war on Germany Aug 28, 1916
Japan
- Declared war on Germany Aug 23, 1914
- Declared war on Austria-Hungary Aug 25, 1914
Liberia
- Declared war on Germany Aug 4, 1914
Montenegro
- Declared war on Austria-Hungary Aug 5, 1914
- Declared war on Germany Aug 8, 1914
- Declared war on Bulgaria Oct 15, 1915
Nicaragua
- Declared war on Germany and Austria-Hungary May 8, 1918
Panama
- Declared war on Germany April 7, 1917
- Declared war on Austria-Hungary Dec 10, 1917
Peru
- Severed relations with Germany Oct 6, 1917
Portugal
- See Germany and Austria-Hungary in this table
Romania
- Declared war on Austria-Hungary Aug 27, 1916
- Capitulated to Central Powers by Treaty of Bucharest May 7, 1918
- Re-entered the war on the side of the Allies Nov 10, 1918
Russia
- Declared war on Turkey Nov 2, 1914
- Declared war on Bulgaria Oct 19, 1915
San Marino
- Declared war on Austria-Hungary June 3, 1915
Serbia
- Declared war on Germany Aug 6, 1914
- Declared war on Turkey Nov 2, 1914
Siam
- Declared war on Germany and Austria-Hungary July 22, 1917
Turkey
- Declared war on Romania Aug 30, 1916
- Severed relations with the US April 23, 1917
United States
- Declared war on Germany April 6, 1917
- Declared war on Austria-Hungary Dec 7, 1917
Uruguay
- Severed relations with Germany Oct 7, 1917
|
