International Committee of the Red Cross (ICRC)

International Special Committee on Radio Interference

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)    

frame cross member / frame cross-member

echoing cross-section; echoing cross section

radar cross-section / radar cross section (RCS); radar signature; radar crossover

red battle

red beret

red forces

red tab

red phosphorus (RP)

red fume

cluster red star

infra-red telescope

red sensitivity

red, right, returning

MIRA (Milan Infra Red Attachment)

IRIS-T SLM (Infra Red Imaging System Tail/Thrust Vector-Controlled, Surface Launched Medium Range)

electro-optical / infra-red (EO/IR)

red, green, blue (RGB)

red lined man

RGB color model (red, green, blue)

Red team

ad hoc committee

Alliance Ground Surveillance Steering Committee

Chairman of the Military Committee (CMC, NATO)

Civil Aviation Planning Committee (CAPC, NATO)

Civil Budget Committee (NATO)

Civil Protection Committee (CPC, NATO)

Defense Planning Committee (DPC, NATO)

Defense Review Committee (NATO)