| A | B |
|---|
| United States | World War I ally |
| British Empire | World War I ally |
| France | World War I ally |
| Russia | World War I ally |
| Serbia | World War I ally |
| Belgium | World War I ally |
| Austro-Hungarian Empire | World War I Central Power |
| Ottoman Empire | World War I Central Power |
| Bulgaria | World War I Central Power |
| German Empire | World War I Central Power |
| United States | World War II ally |
| Canada | World War II ally |
| Great Britain | World War II ally |
| Japan | World War II Axis Power |
| Germany | World War II Axis Power |
| Italy | World War II Axis Power |
| Axis and Allies | 2 sides of World War II |
| Central Powers and Allies | 2 sides of World War I |
| side the U.S. was on in both wars | Allies |
| War Japan and Italy were not in | World War I |
