18th century[]
| Start | Finish | Name of conflict | Belligerents | |
|---|---|---|---|---|
| Victorious party (if applicable) | Defeated party (if applicable) | |||
| 1861 | 1864 | Confederate Revolutionary War |  Confederate States
Supported by:
|
 United States
|
| 1861 | 1867 | Franco-Mexican War |  France  Mexico
Supported by:  Austria  Belgium Confederate States  Egypt Eyalet  Polish exiles  Spain  United Kingdom
|
 Mexican Republicans
Supported by:  United States
|
| 1885 | 1887 | Kentucky War |  Confederate States
|
United States
|
20th Century[]
| Start | Finish | Name of conflict | Belligerents | |
|---|---|---|---|---|
| Victorious party (if applicable) | Defeated party (if applicable) | |||
| 1910 | 1920 | Mexican Civil War | ||
| 1914 | 1918 | World War I | Central Powers:  Germany United States  Austria-Hungary  Ottoman Empire  Bulgaria
|
Quadruple Entente: France  Confederate States United Kingdom
|
| 1916 | 1917 | Workers' Rebellion | Confederate States
|
 Communist Party
|
| 1918 | 1927 | Canadian War | United States
|
 Canadian rebels
Supported by: Confederate States  United Kingdom
|
| 1920 | 1923 | Turkish Civil War |  Turkish Federal Republic Supported by: United States
|
Osman Government
Supported by: Germany
|
| 1923 | 1925 | Austro-Hungarian Civil War | Republican government
Supported by: Germany
|
 Hungarian separatists  Slavic nationalists |
| 1936 | 1939 | Spanish Civil War |  Nationalists
Supported by:  Confederate States United Kingdom  France
|
File:Flag of Spain 1931 1939.svg Republicans
Supported by: United States Germany
|
| 1941 | 1945 | World War II | Allies: United States Germany  Austria Turkey Bulgaria  Poland  Livonia  Ukraine Belgium  Japan (disputed)
|
Entente: Confederate States United Kingdom France  Russia Japan (disputed)
|
| British Civil War | 1945 | 1952 |  English Republic  Republic of Scotland (1945-1947)
|
United Kingdom
After 1947: Scotland  Welsh Separatists  Irish Protestants
|
