The Nations Involved in World War II
Albania |
|
Declared war on U.S. |
Dec. 17, 1941 |
Argentina |
|
| Severed diplomatic relations with Bulgaria,
Hungary & Romania |
Feb. 4, 1944 |
Declared war on Germany, Japan |
March 27, 1945 |
| Australia |
|
| Declared war on Germany |
Sept. 3, 1939 |
| Declared war on Italy |
June 11, 1940 |
| Declared war on Finland, Hungary, Romania |
Dec. 7, 1941 |
| Declared war on Japan |
Dec. 8, 1941 |
| Declared war on Bulgaria |
Jan. 6, 1942 |
| Declared war on Thailand |
March 2, 1942 |
| Austria |
|
| Became involved in the war as a part of Germany, following its annexation by the latter in 1938 |
|
| Belgium |
|
| Invaded by Germany |
May 10, 1940 |
| Belgian government in exile |
Nov. 23, 1940 |
| Severed relations with Romania |
Feb. 12, 1941 |
| Severed relations with Bulgaria |
March 5, 1941 |
| Severed relations with Finland |
June 29, 1941 |
| Declared war on Japan |
Dec. 20, 1941 |
| Bolivia |
|
| Declared war on Germany, Italy, Japan, other Axis nations |
Dec. 4, 1943 |
| Brazil |
|
| Declared war on Germany, Italy |
Aug. 22, 1942 |
| Declared war on Japan |
June 6, 1945 |
| Bulgaria |
|
| Severed relations with Belgium, Netherlands, Poland |
March 4, 1941 |
| Declared war on Greece, Hungary, Yugoslavia |
April 24, 1941 |
| Declared war on Soviet Union |
June 22, 1941 |
| Declared war on U.S., Great Britain |
Dec. 12, 1941 |
| Declared its neutrality |
Aug. 26, 1944 |
| Declared war on Germany |
Sept. 7, 1944 |
| Severed relations with Japan |
Nov. 10, 1944 |
| Burma |
|
| Declared war on U.S., Great Britain |
Aug. 1, 1943 |
| Canada |
|
| Declared war on Germany |
Sept. 10, 1939 |
| Declared war on Italy |
June 11, 1940 |
| Declared war on Finland, Hungary, Romania, Japan |
Dec. 7, 1941 |
| Severed relations with France |
Nov. 9, 1942 |
| Chile |
|
| Severed relations with Germany, Italy |
Jan. 20, 1943 |
| Severed relations with Bulgaria, Hungary, Romania, France |
May 18, 1943 |
| Declared war on Japan |
April 11, 1945 |
| China |
|
| Declared war on Germany, Italy, Japan |
Dec. 9, 1941 |
| Severed relations with France |
Aug. 1, 1943 |
| Colombia |
|
| Severed relations with Japan |
Dec. 8, 1941 |
| Severed relations with Italy |
Dec. 19, 1941 |
| Severed relations with France |
Nov. 26, 1942 |
| Declared war on Germany |
Nov. 26, 1943 |
| Costa Rica |
|
| Declared war on Japan |
Dec. 8, 1941 |
| Declared war on Germany, Italy |
Dec. 11, 1941 |
| Croatia |
|
| As an Axis-created puppet |
Dec. 14, 1941 |
| Cuba |
|
| Declared war on Japan |
Dec. 9, 1941 |
| Declared war on Germany, Italy |
Dec. 11, 1941 |
| Severed relations with France |
Nov. 9, 1942 |
| Czechoslovakia |
|
| Czech government in exile |
Dec. 16, 1941 |
| Denmark |
|
| Invaded by Germany |
April 8, 1940 |
| Under German occupation |
May 10, 1940 |
| Severed relations with Belgium, Norway |
July 15, 1940 |
| Severed relations with Soviet Union |
June 26, 1941 |
| After surrender of German troops in Denmark |
May 17, 1945 |
| Dominican Republic |
|
| Declared war on Japan |
Dec. 8, 1941 |
| Declared war on Germany, Italy |
Dec. 11, 1941 |
| Severed relations with France |
Nov. 11, 1942 |
| Ecuador |
|
| Severed relations with Germany, Italy, Japan |
Jan. 29, 1942 |
| Egypt |
|
| Severed relations with Italy |
June 12, 1940 |
| Severed relations with Hungary, Romania |
Dec. 15, 1941 |
| Severed relations with Bulgaria, Finland |
Jan. 5, 1942 |
| Severed relations with France |
Jan. 6, 1942 |
| Declared war on Germany, Japan |
Feb. 24, 1945 |
| El Salvador |
|
| Declared war on Japan |
Dec. 8, 1941 |
| Declared war on Germany, Italy |
Dec. 12, 1941 |
| Severed relations with France |
Nov. 13, 1942 |
| Ethiopia |
|
| Declared war on Germany, Italy, Japan |
Dec. 14, 1942 |
| Finland |
|
| Invaded by Soviet Union |
Nov. 30, 1939 |
| Concluded peace treaty with USSR |
March 12, 1940 |
| Declared war on Soviet Union |
June 25, 1941 |
| Declared war on Great Britain |
Dec. 6, 1941 |
| Severed relations with Hungary, Croatia, Slovakia |
Sept. 19, 1944 |
| Severed relations with Japan |
Sept. 22, 1944 |
| Declared war on Germany |
March 3, 1945 |
| France |
|
| Declared war on Germany |
Sept. 3, 1939 |
| Declared war on Italy |
June 11, 1940 |
| Capitulated to Germany |
June 22, 1940 |
| Under German domination |
July 5, 1940 |
| Severed relations with Belgium, Netherlands, Norway |
Sept. 5, 1940 |
| Severed relations with Poland |
Sept. 23, 1940 |
| Severed relations with Soviet Union |
June 30, 1941 |
| Severed relations with Yugoslavia |
Aug. 22, 1941 |
| Severed relations with Greece |
June 30, 1942 |
| Severed relations with U.S. |
Nov. 8, 1942 |
| Severed relations with Peru |
Jan. 26, 1943 |
| The Free French National Council, formed
in exile on Sept. 23, 1941 |
Dec. 8, 1941 |
| Germany |
|
| Invaded Poland |
Sept. 1, 1939 |
| Invaded Denmark, Norway |
April 8, 1940 |
| Invaded Netherlands, Belgium, France |
May 10, 1940 |
| Invaded Greece, Yugoslavia |
April 6, 1941 |
| Invaded Soviet Union |
June 22, 1941 |
| Declared war on U.S. |
Dec. 11, 1941 |
| Great Britain |
|
| Declared war on Germany |
Sept. 3, 1939 |
| Declared war on Italy |
June 11, 1940 |
| Declared war on Finland, Hungary, Romania, Japan |
Dec. 7, 1941 |
| Declared war on Bulgaria |
Dec. 13, 1941 |
| Declared war on Thailand |
Jan. 25, 1942 |
| Greece |
|
| Invaded by Italy |
Oct. 28, 1940 |
| Invaded by Germany |
April 6, 1941 |
| Severed relations with Bulgaria, Hungary |
April 7, 1941 |
| Severed relations with Japan |
Dec. 7, 1941 |
| Guatemala |
|
| Declared war on Japan |
Dec. 9, 1941 |
| Declared war on Germany, Italy |
Dec. 11, 1941 |
| Severed relations with France |
Nov. 12, 1942 |
| Haiti |
|
| Declared war on Japan |
Dec. 8, 1941 |
| Declared war on Germany, Italy |
Dec. 12, 1941 |
| Declared war on Bulgaria, Hungary, Romania |
Dec. 24, 1941 |
| Severed relations with France |
Nov. 10, 1942 |
| Honduras |
|
| Declared war on Japan |
Dec. 8, 1941 |
| Declared war on Germany, Italy |
Dec. 13, 1941 |
| Severed relations with France |
Nov. 13, 1942 |
| Hungary |
|
| Severed relations with Greece |
June 24, 1941 |
| Declared war on Soviet Union |
June 27, 1941 |
| Declared war on U.S. |
Dec. 13, 1941 |
| Severed relations with Brazil |
May 2, 1942 |
| Severed relations with Uruguay |
May 4, 1942 |
| Declared war on Romania |
Sept. 7, 1944 |
| After signing armistice with Allies |
Jan. 20, 1945 |
| Iceland |
|
| Occupied by British armed forces |
1940 |
| India |
|
| Declared war on Finland, Hungary, Romania |
Dec. 7, 1941 |
| Iran |
|
| Occupied by Great Britain and Soviet Union jointly |
Aug. 25, 1941 |
| Severed relations with Bulgaria, Hungary, Italy, Romania |
Sept. 16, 1941 |
| Severed relations with France |
Feb. 5, 1942 |
| Declared war on Germany |
Sept. 9, 1943 |
| Declared war on Japan |
March 1, 1945 |
| Iraq |
|
| Severed relations with France |
Nov. 16, 1941 |
| Declared war on Germany, Italy, Japan |
Jan. 17, 1943 |
| Italy |
|
| Declared war on France, Great Britain |
June 10, 1940 |
| Invaded Greece |
Oct. 28, 1940 |
| Declared war on Yugoslavia |
April 6, 1941 |
| Declared war on Soviet Union |
June 22, 1941 |
| Declared war on U.S. |
Dec. 11, 1941 |
| Declared war on Cuba, Guatemala |
Dec. 13, 1941 |
| After unconditional surrender to Allies
on Sept. 8, 1943 |
Oct. 13, 1943 |
| Declared war on Japan |
July 14, 1945 |
| Japan |
|
| Invaded French Indochina |
Sept. 22, 1940 |
| Severed relations with Poland |
Oct. 5, 1941 |
| Declared war on U.S., Great Britain, Australia, Canada, New Zealand, South Africa |
Dec. 7, 1941 |
| Declared war on Netherlands |
Jan. 11, 1942 |
| Lebanon |
|
| Declared war on Germany, Japan |
Feb. 27, 1945 |
| Liberia |
|
| Declared war on Germany, Japan |
Jan. 27, 1944 |
| Luxembourg |
|
| Invaded by Germany |
May 10, 1940 |
| Severed relations with France |
Sept. 5, 1940 |
| Manchukuo |
|
| As a Japanese puppet state |
Dec. 8, 1941 |
| Mexico |
|
| Severed relations with Hungary |
Dec. 19, 1941 |
| Severed relations with Bulgaria |
Dec. 20, 1941 |
| Declared war on Germany, Italy, Japan |
May 22, 1942 |
| Severed relations with France |
Nov. 9, 1942 |
| MongolIan People’s Republic |
|
| Declared war on Japan |
Aug. 9, 1945 |
| Netherlands |
|
| Invaded by Germany |
May 10, 1940 |
| Dutch government in exile |
July 15, 1940 |
| Severed relations with Romania |
Feb. 11, 1941 |
| Severed relations with Bulgaria |
March 9, 1941 |
| Severed relations with Hungary |
April 9, 1941 |
| Severed relations with Finland |
June 28, 1941 |
| Declared war on Japan |
Dec. 8, 1941 |
| Declared war on Italy |
Dec. 11, 1941 |
| Netherlands East Indies invaded by Japan |
Jan. 11, 1942 |
| New Zealand |
|
| Declared war on Germany |
Sept. 3, 1939 |
| Declared war on Italy |
June 11, 1940 |
| Declared war on Finland, Hungary, Romania |
Dec. 7, 1941 |
| Declared war on Japan |
Dec. 8, 1941 |
| Declared war on Bulgaria |
Dec. 13, 1941 |
| Declared war on Thailand |
Jan. 25, 1942 |
| Severed relations with France |
Nov. 17, 1942 |
| Nicaragua |
|
| Severed relations with France |
Dec. 7, 1941 |
| Declared war on Japan |
Dec. 8, 1941 |
| Declared war on Germany, Italy |
Dec. 11, 1941 |
| Declared war on Bulgaria, Hungary, Romania |
Dec. 19, 1941 |
| Norway |
|
| Invaded by Germany |
April 8, 1940 |
| Norwegian government in exile |
June 13, 1940 |
| Severed relations with Romania |
Feb. 21, 1941 |
| Severed relations with Finland |
Dec. 7, 1941 |
| Severed relations with Japan |
Dec. 9, 1941 |
| Panama |
|
| Declared war on Japan |
Dec. 7, 1941 |
| Declared war on Germany, Italy |
Dec. 12, 1941 |
| Severed relations with France |
Nov. 13, 1942 |
| Paraguay |
|
| Severed relations with Italy |
Jan. 28, 1942 |
| Declared war on Germany, Japan |
Feb. 7, 1945 |
| Peru |
|
| Severed relations with France |
Jan. 26, 1943 |
| Declared war on Germany, Japan |
Feb. 12, 1945 |
| Poland |
|
| Invaded by Germany |
Sept. 1, 1939 |
| Invaded by Soviet Union |
Sept. 17, 1939 |
| Polish government in exile |
Nov. 5, 1940 |
| Severed relations with Italy |
Nov. 13, 1940 |
| Severed relations with Hungary |
Jan. 1, 1941 |
| Severed relations with Bulgaria |
March 5, 1941 |
| Declared war on Japan |
Dec. 11, 1941 |
| Portugal |
|
| Gave Great Britain antisubmarine bases in Azores |
Oct. 12, 1943 |
| Severed relations with Germany |
May 6, 1945 |
| Romania |
|
| Invaded Soviet Union |
June 22, 1941 |
| Severed relations with Greece |
June 24, 1941 |
| Declared war on Great Britain |
Dec. 6, 1941 |
| Declared war on U.S. |
Dec. 12, 1941 |
| Declared war on Nicaragua |
Dec. 19, 1941 |
| Declared war on Haiti |
Dec. 24, 1941 |
| Severed relations with Brazil |
March 6, 1942 |
| Accepted armistice terms imposed by Allies |
Aug. 23, 1944 |
| Declared war on Germany |
Aug. 25, 1944 |
| Declared war on Hungary |
Sept. 7, 1944 |
| Declared war on Japan |
March 7, 1945 |
| San Marino |
|
| Declared war on Germany |
Sept. 21, 1944 |
| Saudi Arabia |
|
| Declared war on Germany, Japan |
March 1, 1945 |
| Slovakia |
|
| As an Axis-created puppet state |
June 22, 1941 |
| Declared war on U.S., Great Britain |
Dec. 12, 1941 |
| South Africa |
|
| Declared war on Germany |
Sept. 6, 1939 |
| Declared war on Italy |
June 11, 1940 |
| Declared war on Finland, Hungary, Japan, Romania |
Dec. 8, 1941 |
| Declared war on Bulgaria |
Dec. 13, 1941 |
| Declared war on Thailand |
Jan. 25, 1942 |
| Severed relations with France |
April 23, 1942 |
| Spain |
|
| Severed relations with Japan |
April 11, 1945 |
| Sweden |
|
| Severed relations with Germany |
May 7, 1945 |
| Syria |
|
| Invaded by Great Britain |
June 8, 1941 |
| Declared war on Germany, Japan |
Feb. 26, 1945 |
| Thailand |
|
| Declared war on U.S., Great Britain |
Jan. 25, 1942 |
| Voided war declaration |
Aug. 16, 1945 |
| Turkey |
|
| Declared war on Germany, Japan |
Feb. 23, 1945 |
| USSR |
|
| Invaded Poland |
Sept. 17, 1939 |
| Invaded Finland |
Nov. 30, 1939 |
| Concluded peace with Finland |
March 12, 1940 |
| Invaded by Germany, Romania |
June 22, 1941 |
| Declared war on Bulgaria |
Sept. 5, 1944 |
| Invaded Romania, Poland, Bulgaria, Yugoslavia
(with agreement with anti-Fascist partisans under Marshal Tito), Hungary |
1944 1945 |
| Declared war on Japan |
Aug. 8, 1945 |
| U.S. |
|
| Declared war on Japan |
Dec. 8, 1941 |
| Declared war on Germany, Italy |
Dec. 11, 1941 |
| Declared war on Bulgaria, Hungary, Romania |
June 5, 1942 |
| Severed relations with Finland |
June 30, 1944 |
| Uruguay |
|
| Severed relations with Italy |
Jan. 25, 1942 |
| Severed relations with France |
May 12, 1943 |
| Declared war on Germany, Japan |
Feb. 15, 1945 |
| Venezuela |
|
| Severed relations with Italy |
Dec. 31, 1941 |
| Severed relations with France |
Nov. 27, 1942 |
| Declared war on Germany, Japan |
Feb. 15, 1945 |
| Yugoslavia |
|
| Invaded by Germany |
April 6, 1941 |
| Invaded by Hungary |
April 10, 1941 |
| Yugoslav government in exile |
Aug. 22, 1941 |
| Declared war on Japan |
Dec. 7, 1941 |