SUBJECT-4208.dossier · instrument · status: active
BA
subject of file

BRUSA Agreement

1946 British-US Communication Intelligence Agreement, basis for Five Eyes intelligence sharing
Tracked because 1946 British-US Communication Intelligence Agreement, basis for Five Eyes intelligence sharing · 3 documented connections
Facts on record1
Connections mapped3
Sources cited6
Evidence: 1S
Network web → Timeline → Compare with… → Position Drift → Coverage tone → View on Graph → Export CSV JSON Dossier ← Entity Directory
Stated vs Revealed
No documented contradictions on file.
PATTERN institution → [treaty partner] → instrument → [predecesso... 4× PATTERN government agency → [UK coordinating body] → instrument →... 4× PATTERN instrument → [predecessor agreement] → instrument → [trea... 4× PATTERN instrument → [predecessor agreement] → instrument → [UK c... 4×
Connection Map
Key Connections
← UK-US Mutual Defence Agreement instrument
predecessor agreement
The UK-US Mutual Defence Agreement (MDA) is a successor to the broader BRUSA (UKUSA) Agreement, which established the foundational signals intelligence sharing between the UK and US.
Facts (1)
Data Freshness
Stale Last update: 186d ago · Avg age: 274d
Confidence Tiers: Primary Source — cross-referenced government/corporate filings Pending Review — sourced but not independently verified AI Inference — analytical hypothesis from cross-referencing
Raw Filing Records (1) — unsourced metadata
Pending Review Search scope note: No sec filings found for "BRUSA Agreement" in automated database search as of 2026-04-13. This reflects search coverage limits, not confirmed absence from public record.
Added: 13 Apr 2026 UNVERIFIED Research: BRUSA Agreement — SEC filings (no results)
All Connections (3)
→ UKUSA Agreement instrument
type_of_agreement inferential since unknown
The BRUSA Agreement is directly referenced alongside the UKUSA Agreement in the entity list, indicating they are related intelligence-sharing agreements.
part_of_agreement_framework inferential since unknown
The BRUSA Agreement appears in the known entities list in proximity to the Five Eyes Intelligence Oversight and Review Council, suggesting it is part of the Five Eyes intelligence-sharing framework.
predecessor agreement primary since 1948
The UK-US Mutual Defence Agreement (MDA) is a successor to the broader BRUSA (UKUSA) Agreement, which established the foundational signals intelligence sharing between the UK and US.
Sources (6)
2026 UNVERIFIED Research: BRUSA Agreement — Parliamentary records (no results) parliamentary_record Processed 📜 Receipt
2026 UNVERIFIED Research: BRUSA Agreement — Court records (no results) court_document Processed 📜 Receipt
2026 UNVERIFIED Research: BRUSA Agreement — Lobbying disclosures (no results) government_disclosure Processed 📜 Receipt
2026 UNVERIFIED Research: BRUSA Agreement — Corporate registrations (no results) government_disclosure Processed 📜 Receipt
2026 UNVERIFIED Research: BRUSA Agreement — USASpending contracts (no results) contract Processed 📜 Receipt
2026 UNVERIFIED Research: BRUSA Agreement — SEC filings (no results) sec_filing Processed 📜 Receipt