International operating agency

NATO Communications and Information Agency (NCIA / NCI Agency)

aircraft operating agency

US Agency for International Development

international humanitarian law (See international law of armed conflict)

International legion for the Defence of Ukraine (ILDU) / International Legion of Territorial Defence of Ukraine / Ukrainian Foreign Legion

International Military Sports Council (IMSC) / Conseil International du Sport Militaire (CISM)    

advisory agency

aid agency

Allied Tactical Communications Agency (ATCA)

Central Intelligence Agency (CIA)

collection agency

communications agency

Defense Advanced Research Projects Agency (DARPA)

Defense Contract Management Agency

Defense Information Systems Agency (DISA)

Defense Logistics Agency (DLA)

Defense Mapping Agency (DMA)

Defense Security Cooperation Agency (DSCA)

European Defense Agency (EDA)

Federal Emergency Management Agency (FEMA)

intelligence agency

inter-agency cooperation

law-enforcement agency

lead agency

Marine Corps Intelligence Agency (MCIA)

Military Postal Service Agency

Missile Defense Agency (MDA)

National Geospatial-Intelligence Agency (NGA)

National Imagery and Mapping Agency (NIMA)

National Security Agency (NSA)

NATO agency

NATO Battlefield Information Collection and Exploitation System Agency (BICES)