| Date(s): | Country: | % Correct |
|---|---|---|
| 1914-1918; 1939-1945 | Afghanistan | 100%
|
| 1914-1918; 1968 | Albania | 100%
|
| 1914-1918; 1939-1945 | Argentina | 100%
|
| 1839-1914; 1936-1940 | Belgium | 100%
|
| 1870-1917; 1939-1942 | Brazil | 100%
|
| 1885-1943 | Chile | 100%
|
| 1914-1917 | China | 100%
|
| 1914-1918; 1933-1943 | Colombia | 100%
|
| 1815-1846 | Cracow | 100%
|
| 1864-1940 | Denmark | 100%
|
| 1938-1939 | Estonia | 100%
|
| 1914-1918 | Ethiopia | 100%
|
| 1935-1939; 1956-2022 | Finland | 100%
|
| 1956 | Hungary | 100%
|
| 1918-1940 | Iceland | 100%
|
| 1914-1918; 1939-1943 | Iran | 100%
|
| 1949-1955 | Israel | 100%
|
| 1955-1975 | Laos | 100%
|
| 1938-1939 | Latvia | 100%
|
| 1914-1917; 1939-1944 | Liberia | 100%
|
| 1939 | Lithuania | 100%
|
| 1839-1914; 1920-1940 | Luxembourg | 100%
|
| 1858-1914; 1918-1939 | Nepal | 100%
|
| 1839-1940 | Netherlands | 100%
|
| 1814-1940 | Norway | 100%
|
| 1932-1945 | Portugal | 100%
|
| 1939-1941 | Saudi Arabia | 100%
|
| 1914-1918; 1940-1945 | Spain | 100%
|
| 1814-2022 | Sweden | 100%
|
| 1940-1941 | Thailand | 100%
|
| 1939-1945 | Tibet | 100%
|
| 1940-1945 | Turkey | 100%
|
| 1921-1941 | Tuva | 100%
|
| 1991-2014 | Ukraine | 100%
|
| 1914-1917; 1939-1941 | United States | 100%
|
| 1870-1945 | Uruguay | 100%
|
| 1914-1918; 1939-1942 | Venezuela | 100%
|
| 1718-1797 | Venice | 100%
|
| 1940-1941; 1949-1992 | Yugoslavia | 100%
|
| 1906-1941 | El Salvador | 0%
|
| 1940-1941 | Greenland | 0%
|
| 1854-1898 | Hawaii | 0%
|
| 1947-1948 | Hyderabad | 0%
|
| 1914-1915 | Italy | 0%
|
| 1854-1899 | Orange | 0%
|
| 1881-1899 | South Africa | 0%
|
| 1939-1941 | Soviet Union | 0%
|
| 1836-1846 | Texas | 0%
|
| 1939-1945 | Yemen | 0%
|