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Active Military Alliances

All active military alliances as listed on Wikipedia - Source This list includes all members listed, including terrorist groups and disputed countries. This is true as of 17/10/2023.
Quiz by Waterjets
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Last updated: March 13, 2024
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First submittedOctober 16, 2023
Times taken759
Average score83.3%
Rating4.67
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Anglo-Portuguese Treaty of 1373
Joined in
Members
1373
Kingdom of Portugal
1373
Kingdom of England
 
 
Treaty of Windsor
Joined in
Members
1386
Kingdom of Portugal
1386
Kingdom of England
 
 
Entente Cordiale
Joined in
Members
1904
France
1904
United Kingdom
 
 
Ogdensburg Agreement
Joined in
Members
1940
Canada
1940
United States of America
 
 
Five Eyes
Joined in
Members
1943
United States of America
1943
Australia
1943
New Zealand
1943
United Kingdom
1943
Canada
 
 
Inter-American Treaty of Reciprocal Assistance (Rio Pact)
Joined in
Members
1948
Argentina
1982
The Bahamas
1948
Brazil
1948
Chile
1948
Colombia
1948
Costa Rica
1948
Dominican Republic
1948
El Salvador
1948
Guatemala
1948
Haiti
1948
Honduras
1948
Panama
1948
Paraguay
1948
Peru
1967
Trinidad and Tobago
1948
United States of America
1948 - 2019, 2020 - Present
Uruguay
1948 - 2015, 2019 - Present
Venezuela
 
 
North Atlantic Treaty Organization (NATO)
Joined in
Members
1949
Belgium
1949
Canada
1949
Denmark
1949
France
1949
Iceland
1949
Italy
1949
Luxembourg
1949
Netherlands
1949
Norway
1949
Portugal
1949
United Kingdom
1949
United States of America
1952
Greece
1952
Turkey
1955
West Germany
1982
Spain
1990
Germany
1999
Czech Republic
1999
Hungary
1999
Poland
2004
Bulgaria
2004
Estonia
2004
Latvia
2004
Lithuania
2004
Romania
2004
Slovakia
2004
Slovenia
2009
Albania
2009
Croatia
2017
Montenegro
2020
North Macedonia
2023
Finland
 
 
Mutual Defense Treaty (United States - Philippines)
Joined in
Members
1951
United States of America
1951
Philippines
 
 
ANZUS Treaty
Joined in
Members
1951
United States of America
1951
New Zealand
1951
Australia
 
 
U.S.-Japan Alliance
Joined in
Members
1951
United States of America
1951
Japan
 
 
Brazil–United States Treaty
Joined in
Members
1952
Brazil
1952
United States of America
 
 
US–Israel Mutual Defense Assistance Agreement
Joined in
Members
1952
Israel
1952
United States of America
 
 
Mutual Defense Treaty (United States–South Korea)
Joined in
Members
1953
South Korea
1953
United States of America
 
 
Mutual Defense Assistance Agreement (United States-Pakistan)
Joined in
Members
1954
United States of America
1954
Pakistan
 
 
US-UK Mutual Defence Agreement
Joined in
Members
1958
United States of America
1958
United Kingdom
 
 
Treaty of Mutual Cooperation and Security between the United States and Japan
Joined in
Members
1960
Japan
1960
United States of America
 
 
Sino-North Korean Mutual Aid and Cooperation Friendship Treaty
Joined in
Members
1961
China
1961
North Korea
 
 
Thanat–Rusk Communiqué
Joined in
Members
1962
Thailand
1962
United States of America
 
 
Five Power Defence Arrangements
Joined in
Members
1971
Australia
1971
Malaysia
1971
New Zealand
1971
Singapore
1971
United Kingdom
 
 
Taiwan Relations Act
Joined in
Members
1979
United States of America
1979
Taiwan
 
 
Regional Security System
Joined in
Members
1982
Antigua and Barbuda
1982
Barbados
1982
Dominica
1982
Saint Lucia
1982
Saint Vincent and the Grenadines
1983
Saint Kitts and Nevis
1985
Grenada
2022
Guyana
2023
Jamaica
 
 
Peninsula Shield Force
Joined in
Members
1984
Bahrain
1984
Kuwait
1984
Oman
1984
Qatar
1984
Saudi Arabia
1984
United Arab Emirates
 
 
Collective Security Treaty Organization (CSTO)
Joined in
Members
1992
Armenia
1992
Belarus
1992
Kazakhstan
1992
Kyrgyzstan
1992
Russia
1992
Tajikistan
 
 
Union State
Joined in
Members
1997
Belarus
1997
Russia
 
 
European Union (EU)
Joined in
Members
1957
Belgium
1957
France
1957
Germany
1957
Italy
1957
Luxembourg
1957
Netherlands
1973
Denmark
1973
Ireland
1981
Greece
1986
Portugal
1986
Spain
1995
Austria
1995
Finland
1995
Sweden
2004
Cyprus
2004
Czech Republic
2004
Estonia
2004
Hungary
2004
Latvia
2004
Lithuania
2004
Malta
2004
Poland
2004
Slovakia
2004
Slovenia
2007
Bulgaria
2007
Romania
2013
Croatia
Agreement on Strategic Partnership and Mutual Support
Joined in
Members
2010
Turkey
2010
Azerbaijan
 
 
Lancaster House Treaties
Joined in
Members
2010
France
2010
United Kingdom
 
 
Enhanced Defense Cooperation Agreement
Joined in
Members
2014
United States of America
2014
Philippines
 
 
Islamic Military Counter Terrorism Coalition
Joined in
Members
2021
Uganda
2015
Jordan
2015
United Arab Emirates
2015
Afghanistan
2015
Bangladesh
2015
Brunei
2015
Bahrain
2015
Pakistan
2015
Chad
2015
Turkey
2015
Burkina Faso
2015
Benin
2015
Ivory Coast
2015
Djibouti
2015
Tunisia
2015
Togo
2015
Sierra Leone
2015
Sudan
2015
Senegal
2015
Saudi Arabia
2015
The Gambia
2015
Gabon
2016
Oman
2015
Somalia
2015
Comoros
2015
Palestine
2015
Guinea-Bissau
2015
Guinea
2015
Lebanon
2015
Qatar
2022
Kenya
2015
Kuwait
2015
Malaysia
2015
Mali
2015
Maldives
2015
Libya
2015
Niger
2015
Mauritania
2015
Morocco
2015
Egypt
2015
Yemen
2015
Nigeria
 
 
Russia–Syria–Iran–Iraq coalition
Joined in
Members
2015
Russia
2015
Syria
2015
Iran
2015
Iraq
2015
Hezbollah
 
 
Anglo-Polish Defense Treaty
Joined in
Members
2017
United Kingdom
2017
Poland
 
 
US-Greece Defense Agreement
Joined in
Members
2019
Greece
2019
United States
 
 
Lublin Triangle
Joined in
Members
2020
Lithuania
2020
Poland
2020
Ukraine
 
 
AUKUS
Joined in
Members
2021
Australia
2021
United Kingdom
2021
United States of America
 
 
Franco-Greek defence agreement
Joined in
Members
2021
Greece
2021
France
 
 
Shusha Declaration
Joined in
Members
2021
Turkey
2021
Azerbaijan
 
 
Israel-United Kingdom Defence Pact
Joined in
Members
2021
Israel
2021
United Kingdom
 
 
US-Jordan Defense Cooperation Agreement
Joined in
Members
2021
Jordan
2021
United States of America
 
 
British–Polish–Ukrainian trilateral pact
Joined in
Members
2022
Poland
2022
United Kingdom
2022
Ukraine
 
 
Solomon Islands-China Security Pact
Joined in
Members
2022
Solomon Islands
2022
China
 
 
UK-Sweden Defence Agreement
Joined in
Members
2022
United Kingdom
2022
Sweden
 
 
UK-Finland Defence Agreement
Joined in
Members
2022
United Kingdom
2022
Finland
 
 
UK-Oman Mutual Defence Agreement
Joined in
Members
2022
United Kingdom
2022
Oman
 
 
Egypt-Iraq-Jordan Entente
Joined in
Members
2022
Egypt
2022
Iraq
2022
Jordan
 
 
Japan-Australia Reciprocal Access Agreement
Joined in
Members
2023
Australia
2023
Japan
 
 
Anglo-Japanese Reciprocal Access Agreement
Joined in
Members
2023
Japan
2023
United Kingdom
 
 
Anglo-Greek Defence Agreement
Joined in
Members
2023
United Kingdom
2023
Greece
 
 
Papua New Guinea-United States Defence Agreement
Joined in
Members
2023
Papua New Guinea
2023
United States of America
 
 
Alliance of Sahel States
Joined in
Members
2023
Burkina Faso
2023
Mali
2023
Niger
 
 
Association Trio
Joined in
Members
2021
Georgia
2021
Moldova
2021
Ukraine
 
 
United Nations Command
Joined in
Members
1950
United States of America
1950
United Kingdom
1950
Australia
1950
The Netherlands
1950
Canada
1950
France
1950
Turkey
1950
New Zealand
1950
Philippines
1950
Thailand
1950
South Africa
1950
Greece
1950
Belgium
1950
Colombia
1999
Norway
2000
Denmark
2013
Italy
8 Comments
+1
Level 57
Oct 17, 2023
good quiz but Uruguay is spelt wrong
+3
Level 72
Oct 23, 2023
Was hoping to find the Alliance of Sahel States here, I know I'm a bit immature but it has a fun acronym.

Sadly you've misspelled Kazakhstan and Afghanistan. A bit ironic that Afghanistan is on the IMCTC, but makes sense since they'd probably be the one that needs it the most.

+1
Level 72
Mar 11, 2024
Heyy, it's here now! Pretty sure that Mauritania and Chad aren't in it though, what's with that?
+1
Level 32
Mar 12, 2024
I got the info from here: https://www.alliance-sahel.org/en/sahel-alliance/

It says that they are partners on the website but I apologize if I am wrong.

+1
Level 72
Mar 13, 2024
That appears to be a different organisation. The Wikipedia page for the Alliance of Sahel States mentions that it's separate from the Sahel Alliance, which is a development initiative.
+1
Level 32
Mar 13, 2024
Alright fair enough, I will change it
+1
Level 55
Oct 26, 2023
Great quiz but what about ANZUK (Australia, New Zealand, United Kingdom)?
+2
Level 66
Dec 4, 2023
Great quiz, but I would consider having Hezbollah be a given answer as it’s a political party and not an actual territory