Agreement between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland for Cooperation on the Uses of Atomic Energy for Mutual Defence Purposes

E43855

The Mutual Defense Agreement (1958) is a landmark Cold War-era treaty that established extensive nuclear weapons and atomic energy cooperation between the United States and the United Kingdom for mutual defense.

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AI-generated illustration of Agreement between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland for Cooperation on the Uses of Atomic Energy for Mutual Defence Purposes

This AI-generated illustration was produced by black-forest-labs/FLUX.2-dev (1024x1024) from a prompt written by openai/gpt-oss-120b from the entity's label + description.

Prompt

Generate an image of Agreement between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland for Cooperation on the Uses of Atomic Energy for Mutual Defence Purposes (The Mutual Defense Agreement (1958) is a landmark Cold War-era treaty that established extensive nuclear weapons and atomic energy cooperation between the United States and the United Kingdom for mutual defense.)

All labels observed (6)

How this entity was disambiguated

Statements (48)

Predicate Object
instanceOf bilateral treaty ⓘ
defence agreement ⓘ
nuclear cooperation agreement ⓘ
alsoKnownAs 1958 Mutual Defense Agreement ⓘ
1958 US–UK Mutual Defence Agreement ⓘ
US–UK Mutual Defense Agreement ⓘ
complements North Atlantic Treaty of 1949 ⓘ
context Cold War ⓘ
countrySignatory United Kingdom of Great Britain and Northern Ireland ⓘ
linked to: United Kingdom

United States of America ⓘ
dateSigned 1958-07-03 ⓘ
enables cooperation on nuclear submarine propulsion ⓘ
transfer of fissile material from the United States to the United Kingdom ⓘ
transfer of nuclear warhead design information ⓘ
enteredIntoForce 1958-08-04 ⓘ
field military nuclear technology ⓘ
nuclear deterrence ⓘ
governs transfer of special nuclear material for defence purposes between the United States and the United Kingdom ⓘ
hasBeenExtended true ⓘ
historicalSignificance cornerstone of US–UK nuclear weapons collaboration ⓘ
first agreement allowing the United States to share detailed nuclear weapons design information with another state ⓘ
inForce true ⓘ
initialDuration 10 years ⓘ
language English ⓘ
legalBasis United States Atomic Energy Act of 1954 ⓘ
notableAmendment 1963 amendment expanding scope of cooperation ⓘ
1974 amendment following UK accession to the European Communities ⓘ
2004 renewal and amendment ⓘ
2014 renewal and amendment ⓘ
placeSigned Washington, D.C. ⓘ
purpose cooperation on the uses of atomic energy for mutual defence purposes ⓘ
exchange of classified information on nuclear weapons design ⓘ
exchange of special nuclear material for defence ⓘ
nuclear weapons cooperation ⓘ
relatedTo North Atlantic Treaty Organization ⓘ
linked to: NATO

UK Trident nuclear weapons programme ⓘ
US–UK Polaris Sales Agreement ⓘ
US–UK nuclear weapons cooperation ⓘ
US–UK special relationship ⓘ
renewalInterval 10 years ⓘ
shortName Mutual Defense Agreement (1958) ⓘ
US–UK Mutual Defence Agreement ⓘ
subjectMatter atomic energy ⓘ
exchange of nuclear materials ⓘ
exchange of nuclear technology ⓘ
exchange of nuclear weapons-related information ⓘ
nuclear propulsion for naval vessels ⓘ
nuclear weapons ⓘ

How these facts were elicited

Referenced by (9)

Full triples — surface form annotated when it differs from this entity's canonical label.

Mutual Defense Agreement (1958) → officialName → Agreement between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland for Cooperation on the Uses of Atomic Energy for Mutual Defence Purposes ⓘ
US–UK MDA → fullName → Agreement between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland for Cooperation on the Uses of Atomic Energy for Mutual Defence Purposes ⓘ
US–UK MDA → predecessor → 1948 US–UK Modus Vivendi on atomic energy cooperation ⓘ
linked to: Agreement between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland for Cooperation on the Uses of Atomic Energy for Mutual Defence Purposes
Agreement between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland for Cooperation on the Uses of Atomic Energy for Mutual Defence Purposes → shortName → US–UK Mutual Defence Agreement ⓘ
linked to: Agreement between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland for Cooperation on the Uses of Atomic Energy for Mutual Defence Purposes
Agreement between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland for Cooperation on the Uses of Atomic Energy for Mutual Defence Purposes → alsoKnownAs → 1958 US–UK Mutual Defence Agreement ⓘ
linked to: Agreement between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland for Cooperation on the Uses of Atomic Energy for Mutual Defence Purposes
Nuclear weapons policy of the United Kingdom → cooperationFramework → 1958 US–UK Mutual Defence Agreement ⓘ
linked to: Agreement between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland for Cooperation on the Uses of Atomic Energy for Mutual Defence Purposes
Quebec Agreement → established → US–UK nuclear weapons collaboration ⓘ
linked to: Agreement between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland for Cooperation on the Uses of Atomic Energy for Mutual Defence Purposes
Quebec Agreement → influenced → US–UK Mutual Defence Agreement ⓘ
linked to: Agreement between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland for Cooperation on the Uses of Atomic Energy for Mutual Defence Purposes
Dreadnought programme → technologySharingContext → UK–US nuclear cooperation ⓘ
linked to: Agreement between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland for Cooperation on the Uses of Atomic Energy for Mutual Defence Purposes