Agency Index

Central Intelligence Agency

The primary foreign intelligence and covert action arm of the US government.

National Security Agency

Signals intelligence, cryptanalysis, and global mass surveillance.

Secret Intelligence Service

UK foreign intelligence collection and covert overseas operations.

Government Communications HQ

UK signals intelligence and cyber operations partner to NSA.

Federal Bureau of Investigation

US domestic intelligence and federal law enforcement agency.

North Atlantic Treaty Organization

Military alliance whose intelligence infrastructure underpinned Operation Gladio.

Office of Strategic Services

WWII predecessor to the CIA; dissolved 1945.

Bundesnachrichtendienst

German foreign intelligence service.

Committee for State Security

Soviet intelligence, counterintelligence, and secret police (dissolved 1991).

HaMossad leModiʿin uleTafkidim Meyuḥadim

Israel's foreign intelligence service and covert operations directorate.