US–UK MDA

E43382

bilateral treaty defence agreement nuclear cooperation agreement

The US–UK MDA is a landmark 1958 nuclear cooperation treaty under which the United States and the United Kingdom share nuclear weapons technology, materials, and information for mutual defense purposes.

Statements (51)

Predicate	Object
instanceOf	bilateral treaty → defence agreement → nuclear cooperation agreement →
allows	cooperation on nuclear reactor technology for naval propulsion → joint development and exchange of nuclear warhead design information → transfer of classified nuclear weapons information from the United States to the United Kingdom → transfer of special nuclear material for defence purposes →
countryParty	United Kingdom → United States of America → surface form: United States
dateSigned	1958-07-03 →
enteredIntoForce	1958-08-04 →
extendedBy	1963 amendment → 1968 amendment → 1974 amendment → 1984 amendment → 1994 amendment → 2004 amendment → 2014 amendment →
field	arms control and disarmament → international security →
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 →
hasProvision	cooperation in the development of defence plans involving nuclear weapons → exchange of information on nuclear reactor design for military purposes → exchange of information on nuclear weapon design, development and fabrication → transfer of special nuclear material for research, development and training →
influenced	development of the UK Polaris missile programme → development of the UK Trident nuclear weapons system →
language	English →
legalBasis	Atomic Energy Act of 1954 → surface form: United States Atomic Energy Act of 1954 (as amended)
predecessor	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 → surface form: 1948 US–UK Modus Vivendi on atomic energy cooperation Quebec Agreement →
purpose	cooperation on the uses of atomic energy for mutual defence purposes → sharing of nuclear materials and information for defence → sharing of nuclear weapons technology between the United States and the United Kingdom →
relatedTo	NATO military doctrine → surface form: NATO nuclear policy Anglo-American relations → surface form: US–UK special relationship Nuclear weapons policy of the United Kingdom → surface form: United Kingdom nuclear weapons programme U.S. thermonuclear weapons program → surface form: United States nuclear weapons programme
renewalInterval	10 years →
renewalRequired	yes →
shortName	US–UK MDA self-link → Mutual Defense Agreement (1958) → surface form: US–UK Mutual Defence Agreement
signatory	UK government → surface form: Government of the United Kingdom of Great Britain and Northern Ireland United States government → surface form: Government of the United States of America
status	in force →
subjectArea	military cooperation → mutual defence → nuclear materials → nuclear technology → nuclear weapons →
yearSigned	1958 →

Referenced by (2)

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

Mutual Defense Agreement (1958) → shortName → US–UK MDA →

US–UK MDA → shortName → US–UK MDA self-link →