| Time Participated | Side | Casualties | Answer | % Correct |
|---|---|---|---|---|
| 1 August 1914 - 11 November 1918 | Central Powers | 2,800,720 | German Empire | 100%
|
| 3 August 1914 - 11 November 1918 | Entente | 1,737,800 | French Third Republic | 97%
|
| 31 October 1918 - 3 November 1918 | Central Powers | 30,000 | First Austrian Republic | 95%
|
| 4 August 1914 - 11 November 1918 | Entente | 1,244,093 | United Kingdom of Great Britain and Ireland | 95%
|
| April 4 1917 - 11 November 1918 | Entente | 117,466 | United States of America | 95%
|
| 4 August 1914 - 11 November 1918 | Entente | 144,337 | Kingdom of Belgium | 92%
|
| 23 May 1915 - 4 November 1918 | Entente | 1,301,400 | Kingdom of Italy | 90%
|
| 14 September 1917 - 19 January 1918 | Entente | 2,000 | Russian Democratic Federative Republic | 90%
|
| 23 August 1914 - 11 November 1918 | Entente | 4,661 | Empire of Japan | 87%
|
| 14 August 1917 - 11 November 1918 | Entente | 20,000 | Republic of China | 82%
|
| 2 November 1914 - 3 October 1918 | Central Powers | 3,271,844 | Ottoman Empire | 79%
|
| 14 October 1915 - 30 September 1918 | Central Powers | 187,500 | Third Bulgarian Tsardom | 79%
|
| 2 July 1917 - 11 November 1918 | Entente | 176,000 | Kingdom of Greece | 77%
|
| 17 August 1916 - 11 November 1918 | Entente | 665,706 | Kingdom of Romania | 74%
|
| 28 July 1914 - 11 November 1918 | Entente | 1,250,000 | Kingdom of Serbia | 74%
|
| 26 February 1916 - 11 November 1918 | Entente | 89,235 | First Portuguese Republic | 72%
|
| 4 August 1914 - 11 November 1918 | Entente | 2,800 | Grand Duchy of Luxembourg | 67%
|
| 1 August 1914 - 11 November 1918 | Entente | 13,325 | Kingdom of Montenegro | 64%
|
| 26 October 1917 - 11 November 1918 | Entente | Unknown | Republic of the United States of Brazil | 64%
|
| 19 December 1914 - 11 November 1918 | Entente | 500,000 | Sultanate of Egypt | 64%
|
| 28 July 1914 - 31 October 1918 | Central Powers | 2,081,200 | Austro-Hungarian Empire | 54%
|
| 19 January 1918 - 3 March 1918 | Non-Entente Nation Against Central Powers | Unknown | Russian Soviet Federative Socialist Republic | 44%
|
| 25 December 1917 - March 1918 | Non-Entente Nation Against Central Powers | 8,000 | Ukrainian People's Republic of Soviets | 38%
|
| 22 July 1914 - 11 November 1918 | Entente | 19 | Kingdom of Siam | 33%
|
| 7 April 1917 - 11 November 1918 | Entente | ~10,000 | Republic of Cuba | 33%
|
| 28 May 1918 - 30 October 1918 | Entente | ~200,000 | First Republic of Armenia | 28%
|
| 28 May 1918 - 11 November 1918 | Central Powers | 6,000 | Azerbaijan Democratic Republic | 26%
|
| 26 July 1914 - 14 September 1917 | Entente | 3,394,369 | Russian Empire | 23%
|
| 10 June 1916 - 11 November 1918 | Entente | 80,000 | Hashemite Kingdom of Hejaz | 21%
|
| Unknown Date | Central Powers | 9,000 | Emirate of Jabal Shammar | 18%
|
| January 1915 - 11 November 1918 | Entente | 50,000 | Emirate of Nejd and Hasa | 18%
|
| 4 August 1914 - 11 November 1918 | Entente | 800 | Sheikhdom of Kuwait | 13%
|
| 10 November 1914 - 11 November 1918 | Entente | Unknown | Idrisid Emirate of Asir | 10%
|
| 16 March 1916 – 6 November 1916 | Central Powers | 231 | Kingdom of Darfur | 10%
|
| 19 March 1918 - 30 April 1918 | Non-Entente Nation Against Central Powers | Unknown | Taurida Soviet Socialist Republic | 10%
|
| 26 July 1918 - 30 October 1918 | Entente | 5,000 | Central-Caspian Dictatorship | 8%
|
| 24 September 1914 – 4 February 1915 | Central Powers | 124 | South African Republic | 8%
|
| September 1916 - June 1917 | Entente | 500 | State of Thessaloniki | 8%
|
| 22 April 1917 - 28 May 1917 | Entente | 140,000 | Transcaucasian Democratic Federative Republic | 8%
|