|
Date:
|
Declaring party:
|
Opponent:
|
|
July 28, 1914
|
Austria-Hungary
|
Serbia
|
|
1 August, 1914
|
Germany
|
Russia
|
|
3 August, 1914
|
France
|
|
4 August, 1914
|
Belgium
|
|
United Kingdom
|
Germany
|
|
5 August, 1914
|
Montenegro
|
Austria-Hungary
|
|
6 August, 1914
|
Austria-Hungary
|
Russia
|
|
Serbia
|
Germany
|
|
8 August, 1914
|
Montenegro
|
|
12 August, 1914
|
France
|
Austria-Hungary
|
|
United Kingdom
|
|
23 August, 1914
|
Japan
|
Germany
|
|
25 August, 1914
|
Austria-Hungary
|
|
28 August, 1914
|
Austria-Hungary
|
Belgium
|
|
1 November, 1914
|
Russia
|
Ottoman Empire
|
|
5 November, 1914
|
France
|
|
United Kingdom
|
|
1 November, 1914
|
Russia
|
Ottoman Empire
|
|
5 November, 1914
|
France
|
|
United Kingdom
|
|
2 December, 1914
|
Serbia
|
Ottoman Empire
|
|
3 December, 1914
|
Montenegro
|
|
5 December, 1914
|
Japan
|
|
23 May, 1915
|
Italy
|
Austria-Hungary
|
|
21 August, 1915
|
Ottoman Empire
|
|
28 August, 1915
|
Germany
|
|
14 October, 1915
|
Bulgaria
|
Serbia
|
|
15 October, 1915
|
Montenegro
|
Bulgaria
|
|
United Kingdom
|
|
16 October, 1915
|
France
|
|
Japan
|
|
19 October, 1915
|
Italy
|
|
Russia
|
|
9 March, 1916
|
Germany
|
Portugal
|
|
15 March, 1916
|
Austria-Hungary
|
|
28 August, 1916
|
Romania
|
Austria-Hungary
|
|
Germany
|
Romania
|
|
30 August, 1916
|
Ottoman Empire
|
|
1 September, 1916
|
Bulgaria
|
|
6 April, 1917
|
United States
|
Germany
|
|
7 April, 1917
|
Cuba
|
|
Panama
|
|
27 June, 1917
|
Greece
|
Austria-Hungary
|
|
Bulgaria
|
|
Germany
|
|
Ottoman Empire
|
|
22 July, 1917
|
Siam
|
Austria-Hungary
|
|
Germany
|
|
4 August, 1917
|
Liberia
|
Germany
|
|
14 August, 1917
|
China
|
Austria-Hungary
|
|
Germany
|
|
26 October, 1917
|
Brazil
|
Germany
|
|
7 December, 1917
|
United States
|
Austria-Hungary
|
|
10 December, 1917
|
Panama
|
|
23 April, 1918
|
Guatemala
|
Germany
|
|
6 May, 1918
|
Nicaragua
|
Austria-Hungary
|
|
Germany
|
|
23 May, 1918
|
Costa Rica
|
Germany
|
|
12 July, 1918
|
Haiti
|
|
19 July, 1918
|
Honduras
|
|