| Answer | Year Joined | Side | % Correct |
|---|---|---|---|
| Austria-Hungary | 1914 | Central | 100%
|
| France | 1914 | Allies | 100%
|
| Germany | 1914 | Central | 100%
|
| UK | 1914 | Allies | 96%
|
| USA | 1917 | Allies | 96%
|
| Belgium | 1914 | Allies | 93%
|
| Italy | 1915 | Allies | 93%
|
| Russia | 1914 | Allies | 93%
|
| Canada | 1914 | Allies | 89%
|
| Serbia | 1914 | Allies | 86%
|
| Australia | 1914 | Allies | 82%
|
| China | 1917 | Allies | 82%
|
| Japan | 1914 | Allies | 82%
|
| Bulgaria | 1915 | Central | 75%
|
| Greece | 1917 | Allies | 75%
|
| India | 1914 | Allies | 75%
|
| New Zealand | 1914 | Allies | 75%
|
| Ottoman Empire | 1914 | Central | 75%
|
| Romania | 1916 | Allies | 75%
|
| Brazil | 1917 | Allies | 71%
|
| Portugal | 1916 | Allies | 71%
|
| Montenegro | 1914 | Allies | 64%
|
| South Africa | 1914 | Allies | 64%
|
| Costa Rica | 1918 | Allies | 61%
|
| Cuba | 1917 | Allies | 61%
|
| Honduras | 1918 | Allies | 61%
|
| Nicaragua | 1918 | Allies | 61%
|
| Panama | 1917 | Allies | 61%
|
| Guatemala | 1918 | Allies | 57%
|
| Haiti | 1918 | Allies | 54%
|