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Countries that Have Formally Declared War

Can you name the countries that have formally declared war in recorded history?
Source: many, many Wikipedia articles
Includes rebel groups that held territory and attempted to become a state
Some countries were not soverign at the time
This list is by no means conplete. Please comment with any additions/corrections
Quiz by SomeNerd
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Last updated: February 13, 2024
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First submittedFebruary 13, 2024
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Date:
Declaring party:
Opponent:
June 323 BC
Athens
Macedonia
282 BC
Rome
Tarentum
268 BC
Athens
Macedonia
246 BC
Ptolema
Seleucia
229 BC
Achaea
Sparta
227 BC
Sparta
Achaea
220 BC
Eleutherna
Rhodes
218 BC
Rome
Carthage
215 BC
Macedonia
Rome
200 BC
Athens
Macedonia
195 BC
Rome
Sparta
171 BC
Rome
Macedonia
170 BC
Ptolema
Seleucia
149 BC
Rome
Carthage
111 BC
Rome
Numidia
88 BC
Rome
Pontus
32 BC
Rome
Ptolema
58
Parthia
Rome
421
Byzantium
Iran
602
Iran
Byzantium
657
Umayyad
Rashidun
965/966
Byzantium
Bulgaria
1110
Chola
Eastern Ganga
1121
Seljuk
Georgia
1176
Byzantium
Rûm
14 June, 1206
England
Gin
16 July, 1242
France
November 1276
England
Wales
1284
Genoa
Pisa
1295
Venice
Genoa
1307
Norway
Denmark
August 1348
Genoa
Byzantium
1387
Bohemia
Bavaria
6 August, 1409
Teutonic Order
Lithuania
Poland
29 March, 1429
Venice
Ottoman Empire
25 June, 1431
Teutonic Order
Poland
14 April, 1438
Burgundy
Brandenburg
Denmark
Holstein
Lüneburg
Mecklenburg
Pomerania
April 1452
Venice
Milan
31 May, 1452
Burgundy
Ghent
22 February, 1454
Poland
Teutonic Order
June 1455
Denmark
Poland
Teutonic Order
28 July, 1463
Venice
Ottoman Empire
1466
Warmia
Teutonic Order
1493
Moscow
Poland
Summer 1496
Sweden
Moscow
28 March, 1507
Genoa
France
1508
Holy Roman Empire
Venice
March 1512
Aragon
France
Castile
León
1512
England
France
December 1519
Poland
Teutonic Order
29 May, 1522
England
France
9 October, 1531
Lucerne
Zürich
Schwyz
Unterwalden
Uri
Zug
1533
Johor
Portugal
1541
Denmark-Norway
Netherlands
12 July, 1542
France
Holy Roman Empire
22 June, 1543
England
France
June 1557
England
France
13 August, 1563
Denmark-Norway
Sweden
Lübeck
1572
Spain
Inca
1577/1578
Ottoman Empire
Iran
1578
Spain
Brunei
Ottoman Empire
17 January, 1595
France
Spain
August 1600
France
Savoy
1603
Iran
Ottoman Empire
1609
Sweden
Russia
April 1611
Denmark-Norway
Sweden
1625
England
Spain
Spring 1633
Poland-Lithuania
Russia
May 1635
France
Spain
1651
Netherlands
Sicily
10 July, 1652
England
Netherlands
May 1656
Russia
Sweden
Denmark
1657
Ottoman Empire
Transylvania
4 March, 1665
Netherlands
England
1666
Virginia
Patawomeck
1672
Savoy
Genoa
27 March,1682
England
Netherlands
6 April, 1682
France
26 October, 1683
England
France
Spain
25 April, 1684
Venice
Ottoman Empire
August 1687
Siam
England
3 April, 1689
Holy Roman Empire
France
4 June, 1690
Savoy
8 May, 1702
Netherlands
15 May, 1702
England
France
Spain
30 September, 1702
Holy Roman Empire
France
October 1703
Savoy
30 August, 1704
Poland-Lithuania
Sweden
18 October, 1709
Denmark-Norway
20 November, 1710
Ottoman Empire
Russia
9 December, 1714
Ottoman Empire
Venice
13 April, 1716
Austria
April 1715
Prussia
Sweden
17 December, 1718
Great Britain
Spain
9 January, 1719
France
25 July, 1722
Massachusetts
Wabanaki
1726
Ottoman Empire
Hotak
1727
Fox
France
October 10, 1733
France
Austria
Saxony
9 April, 1734
Holy Roman Empire
France
23 October, 1739
Great Britain
Spain
1743
Persia
Ottoman Empire
11 March, 1744
France
Great Britain
31 March, 1744
Great Britain
France
2 June, 1744
Massachusetts
France
Quebec
26 June, 1745
Genoa
Sardinia
17 May, 1756
Great Britain
France
17 January, 1757
Holy Roman Empire
Prussia
22 September, 1757
Sweden
February 1760
Cherokee
Great Britain
4 January, 1762
Great Britain
Spain
18 January, 1762
Spain
Great Britain
18 October, 1768
Ottoman Empire
Russia
1768
Poland-Lithuania
Russia
26 April, 1774
Virginia
Mingo
Shawnee
March 1778
France
Great Britain
17 March, 1778
Great Britain
France
13 June, 1778
France
Great Britain
1779
Great Britain
Spain
2 July, 1780
Mysore
Great Britain
December 1780
Great Britain
Netherlands
30 October, 1784
Austria
Netherlands
19 August, 1787
Russia
Ottoman Empire
20 April, 1792
France
Austria
18 May, 1792
Russia
Poland-Lithuania
June 1792
Prussia
Austria
7/8 September, 1792
Cherokee
United States
1 February, 1793
France
Netherlands
Great Britain
February, 1793
Spain
23 March, 1793
Holy Roman Empire
France
1793
Naples
Portugal
Tuscany
6 December, 1798
France
Naples
Sardinia
10 May, 1801
Tripolitania
Sweden
United States
18 May, 1803
United Kingdom
France
23 May, 1804
Persia
Russia
31 October, 1805
Sweden
France
9 October, 1806
Prussia
France
30 December, 1806
Ottoman Empire
Russia
1806
Ashanti
Fante
26 October, 1807
Russia
United Kingdom
14 March, 1808
Denmark
Sweden
1809
Huéscar
Denmark
17 November, 1810
Sweden
United Kingdom
1810
Persia
Russia
June 18, 1812
United States
United Kingdom
22 June, 1812
France
Russia
3 March, 1813
Sweden
France
13 March, 1813
Prussia
1813 August
Austria
France
1 November, 1814
India
Nepal
United Kingdom
15 March, 1815
Naples
Austria
9 April 1815
United Kingdom
Naples
7 August, 1825
Tripolitania
Sardinia
10 December, 1825
Brazil
United Provinces
April 1828
Russia
Ottoman Empire
3 June, 1828
Gran Colombia
Peru
3 July, 1828
Peru
Gran Colombia
23 August, 1828
Tripolitania
Two Sicilies
16 October, 1831
Mexico
Apache
28 December, 1836
Chile
Peru-Bolivia
9 May, 1837
Argentina
December 1838
Mexico
France
11 December, 1845
United Kingdom
Sikh
1845
Paraguay
Argentina
May 13, 1846
United States
Mexico
7 July, 1846
Mexico
United States
March 1848
Sicily
Austria
23 March, 1848
Sardinia
18 August, 1851
Argentina
Brazil
16 October, 1853
Ottoman Empire
Russia
Date:
Declaring party:
Opponent:
27 March, 1854
France
Russia
28 March, 1854
United Kingdom
March 1855
Nepal
Tibet
1 November, 1856
United Kingdom
Persia
19 March, 1858
Orange
Basotho
3 May, 1859
France
Austria
22 October, 1859
Spain
Morocco
November 1864
United Kingdom
Bhutan
23 March, 1865
Paraguay
Argentina
4 May, 1865
Argentina
Paraguay
23 June, 1865
Italy
Austria
24 September, 1865
Spain
Chile
14 January, 1866
Peru
Spain
30 January, 1866
Ecuador
22 March, 1866
Bolivia
May 1870
Chile
Mapuche
16 July, 1870
France
Prussia
16 May, 1876
South Africa
Bapedi
Sekhukhune
18 June, 1876
Montenegro
Ottoman Empire
Serbia
24 April, 1877
Russia
Ottoman Empire
1 March, 1879
Bolivia
Chile
18 March, 1879
United Kingdom
Zulu
5 April, 1879
Chile
Peru
14 November, 1885
Bulgaria
Serbia
31 March, 1891
United Kingdom
Manipur
1892
France
Dahomey
1 August, 1894
China
Japan
Japan
China
1895
Italy
Ethiopia
27 August, 1896
United Kingdom
Zanzibar
17 April, 1897
Ottoman Empire
Greece
April 25, 1898
United States
Spain
June 2, 1899
Philippines
United States
11 October, 1899
Orange
United Kingdom
South Africa
21 June, 1900
China
Austria-Hungary
Belgium
France
Germany
Italy
Japan
Netherlands
Russia
Spain
United Kingdom
United States
8 February, 1904
Japan
Russia
16 February, 1904
Russia
Japan
1904
Montenegro
29 September, 1911
Italy
Ottoman Empire
October 8, 1912
Montenegro
Ottoman Empire
October 17, 1912
Bulgaria
Greece
Serbia
10 July, 1913
Romania
Bulgaria
July 28, 1914
Austria-Hungary
Serbia
1 August, 1914
Germany
Russia
Montenegro
Austria-Hungary
3 August, 1914
Germany
France
6 August, 1914
Austria-Hungary
Russia
12 August, 1914
France
Austria-Hungary
4 August, 1914
United Kingdom
Germany
12 August, 1914
Austria-Hungary
23 August, 1914
Japan
Germany
25 August, 1914
Austria-Hungary
5 November, 1914
United Kingdom
Ottoman Empire
11 November, 1914
Ottoman Empire
France
Russia
United Kingdom
23 May, 1915
Italy
Austria-Hungary
14 October, 1915
Bulgaria
Serbia
15 October, 1915
Montenegro
Bulgaria
United Kingdom
Germany
Portugal
16 October, 1915
France
Bulgaria
19 October, 1915
Italy
Russia
August 1916
Italy
Germany
August 27, 1916
Romania
Austria-Hungary
1 September, 1916
Bulgaria
Romania
April 6, 1917
United States
Germany
July 1917
Greece
Germany
2 July, 1917
Greece
Bulgaria
December 7, 1917
United States
Austria-Hungary
6 May, 1919
United Kingdom
Afghanistan
24 December, 1920
Carnaro
Italy
3 October, 1935
Ethiopia
3 September, 1939
United Kingdom
Germany
Australia
New Zealand
India
Tonga
Transjordan
France
Morocco
Tunisia
4 September, 1939
Nepal
6 September, 1939
South Africa
10 September, 1939
Bahrain
Canada
Oman
17 September, 1939
Soviet Union
Poland
9 November, 1939
Kuwait
Germany
10 May, 1940
Germany
Belgium
Netherlands
10 June, 1940
Italy
France
United Kingdom
11 June, 1940
South Africa
Italy
Australia
New Zealand
France
28 October, 1940
Italy
Greece
23 November, 1940
Belgium
Italy
6 April, 1941
Germany
Greece
22 June, 1941
Germany
Soviet Union
Italy
Tuva
Germany
24 June, 1941
Romania
Soviet Union
25 June, 1941
Finland
5 December, 1941
United Kingdom
Finland
Hungary
Romania
5 December, 1941
Finland
United Kingdom
Hungary
7 December, 1941
Canada
Finland
Hungary
Romania
Australia
Finland
Hungary
Romania
New Zealand
Finland
Hungary
Romania
Japan
United Kingdom
United States
Canada
Japan
Panama
Yugoslavia
8 December, 1941
United Kingdom
United States
Canada
Australia
Costa Rica
Dominican Republic
El Salvador
France
Greece
Guatemala
Haiti
Honduras
Netherlands
New Zealand
Nicaragua
Philippines
South Africa
Tonga
South Africa
Finland
Hungary
Romania
Mongolia
Germany
Manchukuo
United States
Date:
Declaring party:
Opponent:
9 December, 1941
Cuba
Japan
Republic of China
Germany
Italy
Japan
11 December, 1941
Germany
United States
Italy
United States
Germany
Italy
Costa Rica
Germany
Italy
Cuba
Germany
Italy
Dominican Republic
Germany
Italy
Guatemala
Germany
Italy
Nicaragua
Germany
Italy
Netherlands
Italy
Poland
Japan
12 December, 1941
Bulgaria
United Kingdom
United States
Romania
United Kingdom
United States
Slovakia
United Kingdom
United States
El Salvador
Germany
Italy
Haiti
Germany
Italy
Panama
Germany
Italy
13 December, 1941
United Kingdom
Bulgaria
New Zealand
South Africa
Honduras
Germany
Italy
Italy
Cuba
Guatemala
14 December, 1941
Croatia
United Kingdom
United States
16 December, 1941
Czechoslovakia
Bulgaria
Croatia
Finland
Germany
Hungary
Italy
Japan
Romania
Slovakia
17 December, 1941
Albania
United States
19 December, 1941
Nicaragua
Bulgaria
Hungary
Romania
Romania
Nicaragua
20 December, 1941
Belgium
Japan
24 December, 1941
Haiti
Bulgaria
Hungary
Romania
Romania
Haiti
25 December, 1941
Greece
Japan
6 January, 1942
Australia
Bulgaria
25 January, 1942
United Kingdom
Thailand
New Zealand
South Africa
2 March, 1942
Australia
22 May, 1942
Mexico
Germany
Italy
Japan
5 June, 1942
United States
Bulgaria
Hungary
Romania
13 June, 1942
Iroquois
Germany
Italy
Japan
22 August, 1942
Brazil
Germany
Italy
14 December, 1942
Ethiopia
Germany
Italy
Japan
9 January, 1943
Reorganized National Government of China
United Kingdom
United States
17 January, 1943
Iraq
Germany
Italy
Japan
20 January, 1943
Chile
Germany
Italy
7 April, 1943
Bolivia
Germany
Italy
Japan
1 August, 1943
Burma
United Kingdom
United States
9 September, 1943
Iran
Germany
13 October, 1943
Italy
Germany
26 November, 1943
Colombia
Germany
27 January, 1944
Liberia
Germany
Japan
25 August, 1944
Romania
Germany
5 September, 1944
Soviet Union
Bulgaria
7 September, 1944
Hungary
Romania
Romania
Hungary
8 September, 1944
Bulgaria
Germany
21 September, 1944
San Marino
Germany
Italy
23 September, 1944
Philippines
United Kingdom
United States
2 February, 1945
Ecuador
Germany
Japan
7 February, 1945
Paraguay
Germany
Japan
12 February, 1945
Peru
Germany
Japan
15 February, 1945
Uruguay
Germany
Japan
Venezuela
Germany
Japan
23 February, 1945
Turkey
Germany
Japan
24 February, 1945
Egypt
Germany
Japan
26 February, 1945
Lebanon
Germany
Japan
Syria
Germany
Japan
28 February, 1945
Saudi Arabia
Germany
1 March, 1945
Japan
Iran
Japan
3 March, 1945
Finland
Germany
7 March, 1945
Romania
Japan
27 March, 1945
Argentina
Germany
Japan
11 April, 1945
Chile
Japan
7 June, 1945
Brazil
9 July, 1945
Norway
14 July, 1945
Italy
8 August, 1945
Soviet Union
10 August, 1945
Mongolia
Republic of China
People's Republic of China
15 August, 1945
Viet Minh
Japan
Republic of Korea
Democratic People's Republic of Korea
United States
15 May, 1948
Egypt
Israel
Iraq
Jordan
Lebanon
Syria
June 1967
Mauritania
13 July, 1977
Somalia
Ethiopia
2 November, 1978
Tanzania
Uganda
22 September, 1980
Iraq
Iran
15 December, 1989
Panama
United States
1 January, 1994
Zapatista
Mexico
23 February, 1998
Al-Qaeda
Israel
United States
14 May, 1998
Ethiopia
Eritrea
August 10, 1999
Dagestan
Russia
23 December, 2005
Chad
Sudan
13 June, 2008
Djibouti
Eritrea
9 August, 2008
Georgia
Russia
14 January, 2010
Yemen
Al-Qaeda
11 April, 2012
Sudan
South Sudan
1 July, 2015
Egypt
Islamic State
27 September, 2016
South Sudan Democratic Movement
South Sudan
4 December, 2017
Cameroon
Ambazonia
27 September, 2020
Azerbaijan
Armenia
14 November, 2020
Western Sahara
Morocco
8 October, 2023
Israel
Hamas
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