40 O.B.
E591495
40 O.B. is an alternative name for Room 40, the British Admiralty’s World War I codebreaking and signals intelligence unit.
All labels observed (1)
| Label | Occurrences |
|---|---|
| 40 O.B. canonical | 1 |
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
codebreaking organization
ⓘ
military intelligence unit ⓘ signals intelligence unit ⓘ |
| activePeriod | 1914–1919 ⓘ |
| alternativeName | Room 40 NERFINISHED ⓘ |
| classification | secret ⓘ |
| conflict | World War I ⓘ |
| contributedTo |
Allied naval superiority in World War I
ⓘ
British foreign policy decisions during World War I ⓘ |
| country | United Kingdom ⓘ |
| dissolvedIn | 1919 ⓘ |
| employer |
Alfred Ewing
NERFINISHED
ⓘ
Dilly Knox NERFINISHED ⓘ Nigel de Grey NERFINISHED ⓘ Reginald Hall NERFINISHED ⓘ William Montgomery NERFINISHED ⓘ |
| era | early 20th century ⓘ |
| establishedIn | 1914 ⓘ |
| field |
communications intelligence
ⓘ
cryptanalysis ⓘ signals intelligence ⓘ |
| focus |
German diplomatic communications
ⓘ
German naval codes ⓘ |
| location | Admiralty building, London NERFINISHED ⓘ |
| notableFor |
decryption of the Zimmermann Telegram
ⓘ
influencing British naval operations in World War I ⓘ interception and decryption of German naval communications ⓘ |
| operatedBy | British Admiralty NERFINISHED ⓘ |
| operationalDomain |
diplomatic intelligence
ⓘ
naval warfare ⓘ |
| partOf | British naval intelligence NERFINISHED ⓘ |
| relatedTo |
British intelligence community
NERFINISHED
ⓘ
Royal Navy NERFINISHED ⓘ |
| subsequentInfluenceOn |
Bletchley Park
NERFINISHED
ⓘ
Government Code and Cypher School NERFINISHED ⓘ |
| usedLanguage |
German
ⓘ
Naval code systems ⓘ |
| usedMethod |
codebook reconstruction
ⓘ
manual cryptanalysis ⓘ traffic analysis ⓘ |
| usedSource |
cable communications
ⓘ
intercepted radio messages ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.