Category
page 1Defunct United States intelligence agencies
Office of Strategic Services
United States intelligence agency (1942-1945)
Ritchie Boys
WWII US special military intelligence
Counterintelligence Corps
intelligence agency within the United States Army (1941-1961)
Culper Ring
spy ring organized by American Major (later Colonel) Benjamin Tallmadge
Black Chamber
peacetime cryptanalytic organization of the United States
Signal Intelligence Service
codebreaking division of the United States Army during WW2