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# UKUSA Agreement Release

HomeHelpful LinksNSA FOIADeclassification & Transparency InitiativesHistorical ReleasesUKUSA

**Please Note:** These historical documents are PDF images of formerly classified carbon paper and reports that have been declassified. Due to the age and poor quality of some of the PDF images, a screen reader may not be able to process the images into word documents. In accordance with Section 504 of the Rehabilitation Act of 1973, as amended, individuals may request that the government provide auxiliary aids or services to ensure effective communication of the substance of the documents. For such requests, please contact the Freedom of Information Act Office at foianet@nsa.gov or Public Affairs Office at 443-634-0721.

The tradition of intelligence sharing between NSA and its Second party partners has deep and widespread roots that have been cultivated for almost three quarters of a century. During World War II, the U.S. Army and Navy each developed independent foreign SIGINT relationships with the British and the Dominions of Canada, Australia, and New Zealand. These relations evolved and continued across the decades. The bonds, forged in the heat of a world war and tempered by decades of trust and teamwork, remain essential to future intelligence successes.

The March 5, 1946, signing of the BRUSA (now known as UKUSA) Agreement marked the reaffirmation of the vital WWII cooperation between the United Kingdom and United States. Over the next 10 years, appendices to the Agreement, some of which are included with this release to the public, were drafted and revised. These appendices and their annexures provide details of the working relationship between the two partners and also address arrangements with the other Second Parties (Australia, Canada, and New Zealand).

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##### NSA.GOV

                              - About
                              - Leadership
                              - Cybersecurity Collaboration Center 
                              - National Cryptologic Museum 
                              - Contact NSA 
                              - Accessibility
                              - ABA Notice
                              - Site Policies

##### CULTURE

                              - Core Values
                              - Operating Authorities
                              -  Civil Liberties, Privacy, & Transparency Office 
                              - Compliance
                              - Diversity, Equity, Inclusion, & Accessibility
                              - General Counsel
                              - NSA Inspector General

##### HELPFUL LINKS

                              -  
                              - NSA Freedom of Information Act
                              - Privacy Act Requests
                              - Request a Speaker
                              - Prepublication Review
                              - Media Inquiry
                              - Frequently Asked Questions

##### RESOURCES

                              - Classified Materiel Conversion
                              - Commercial Solutions for Classified Program (CSfC) ​
                              - Cryptographic Support Services 
                              - Media Destruction Guidance 
                              - NSA Open Source

##### RELATED LINKS

                              - DNI.gov
                              - Defense.gov
                              - IC on the Record
                              - Intelligence.gov

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