I-beam frame
I – INDIA
I read back
I read you loud and clear
I say again…
I spell
I verify
ice-pick
icebreaking
icing inhibitor
identification
identification badge
identification beacon
identification card (identity / ID card)
identification friend or foe’ (IFF)
identification operator
identification tag; ID tag; (slang. dog tag)
identified vessel
identity intelligence (I2)
ideological war
idler
idler arm
idler wheel
idling
IED detection
IED detector
IED network
IED neutralization
IED neutralizer
IED placement / planting / seeding
IED placer
IED radio activation
IED remote detection
IFF interrogator
IFF transponder
igniter
igniter cord
igniter plug
igniter set
igniter train
igniting charge
igniting fuse
Ignition
ignition agent
ignition charge
ignition coil
ignition cord-fuse
ignition spark
ignition switch
ignition system
ignition tube
illegal
illegal activities
illegal armed group
illegal immigration
illegal trafficking
illicit substance (counter-narcotics)
illicit trafficking of arms
illuminate a night attack
illuminating bomb
illuminating booby-trap simulator
illuminating flare
illuminating gas
illuminating grenade
illuminating light
illuminating radar
illumination
illumination ammunition
illumination firing
illumination grenade
image-converter tube
image intensifier
image intensifier goggles
image-intensifying Passive Driving Periscope (PDP)
image interpretation
image interpreter
image map
imagery
imagery correlation
imagery data recording
imagery exploitation
imagery intelligence (IMINT)
imagery interpretation key
imagery interpreter report
imagery pack
imagery system
imaginary enemy
imaginary time
imaging infrared system (I2R sys)
imitative deception
imitative electronic deception
immediate
immediate-action
immediate-action drill
immediate air support
immediate attack
immediate decontamination (emergency decontamination)
immediate effects
immediate incapacitation
immediate nuclear radiation dose
immediate objective
immediate operational readiness
immediate radiation
immediate reaction forces
immediate ready force
immediate rear
immediate reserve
immediate response force
immediate security
immediate subordinate / superior
immediate treatment
immersion foot
immersion-proof
immersion suit
immigration law
imminent threat
immobile casualties
immobile defense
immobile target
immobilize
immune to countermeasures
immune to military draft
immunity of a warship
immunizing shot
impact
impact area
impact error
impact fuze
impact-sensitive chemical
impairment of mental functions (PTSD)
imparted energy
impartial approach
impartiality
impassable
impending operation
imperial gallon
impermeable clothing / protective suit
impermeable protective clothing
implement kit
implement of war
implementation
implementing arrangements
implied task
implosion
imposition of curfew
impounding of weapons
impregnated clothing
impregnated combat uniform
imprint
improved conventional munitions (ICM)
improved conventional munitions (ICM) projectile
improved road
improvement fire
improvised
improvised booby trap
improvised explosive device (IED)
improvised means
improvised mine
improvised rocket-assisted munition (IRAM); lob bomb (improvised rocket-assisted mortar)
improvised runway
improvised unventilated shelter
improvised weapon
impulse cartridge
impulse noise
in deep rear
in-flight security threat
in ground effect (IGE)
in-place force
in-service logistics support
in-service support
in support of
in the lines
in the open
in-transit visibility (ITV)
inaccessible
inactive
inactive duty training (IDT)
Inactive National Guard (ING)
inactive Reserve (Individual Ready Reserve [IRR])
inboard
incapacitate
incapacitating agent
incapacitating toxicity
incendiaries
incendiary agent
incendiary bomb
incendiary bullet
incendiary device
incendiary effect
incendiary grenade
incendiary material
incendiary munitions
incendiary obstacle
incendiary projectile
incendiary warfare
incendiary warhead
incendiary weapons
incentive fee
incentive mechanism
inch
inch one's way forward
incident
incident command
incident involving the use of arms
incident rate
incident wheel
inclement weather
incline
inclosed works
inclosure
Incoming!
incoming commander
incoming missile
increment
incursion
incursion into enemy territory
indecisive direction
indecisive target
indefensible
independence
independent deployer (naut.)
independent operation
independent (vessel)
index contour line (cart.)
index line / mark
index to adjoining sheets (cart.)
index to boundaries
indexing slot
indicated enemy
indication
indications and warnings (I&W)
indicator
indicator console
indicator lamp
indicator light
indicator system
indigenous population
indigenous research
indirect
indirect air support
indirect approach
indirect fire
indirect fire support
indirect laying
indirect laying position
indirect questioning technique
indirect support
indiscriminate attack
indiscriminate bombing
indiscriminate firing
indiscriminate use of force
individual decontamination
individual decontamination kit
individual emplacement
individual field messing
individual first-aid kit
individual item (of equipment)
individual medical pouch
individual mobilization augmentee (IMA)
individual nuclear, biological and chemical protection
individual portable filter
individual protection
individual protective equipment (IPE)
individual purchase order
individual ready reserve (IRR)
individual rush
individual served weapon
individual training
individual weapon
indivisibility of security
indoctrinate
indoctrination
indoctrination center
induced reaction
induct
inductee
induction
induction mine-detector
industrial base
Industrial College of the Armed Forces
industrial corporation
industrial mobilization plans
Industrial Planning Committee (IPC, NATO)
industrial site
inert explosive
inert gas
inert mine
inert round
inertial guidance
inertial guidance system
inertial measurement unit (IMU)
inertial navigation and attack system (INAS)
inertial navigation system (INS)
infantry
infantry battalion
infantry carrier
infantry counterfire platoon
infantry division
infantry entrenchment
infantry fighting vehicle (IFV)
infantry landing ship
infantry mobility vehicle (IMV)
infantry squad
infantry-tank team
infantry unit
infantryman
infect
infectious disease protection
inferior grade
infiltrate
infiltration
infiltration lane
inflammable
inflatable ballonet
inflatable buoyancy tank
inflatable craft
inflate a tyre
Inflict
inflict a defeat
inflict damage / losses
inflict injury
inflict losses (on)
influence field
influence mine
influence operations
influence release sinker
influence sweep
info-kill
inform
informal briefing
informal request
informal visit to a port
information acquisition / collection / gathering
information and intelligence-based operation
information blackout
information collection and analysis system
information collection and reporting strategy
Information, Communication, Technology Management (ICTM)
information environment
information exchange requirements (IER)
information fusion
information gathering
information-gathering assets
information management (IM)
Information Management Officer (IMO)
information management support
information officer
information operations
information operations coordination board (IOCB)
information operations (IO) (Info Ops)
Information Operations Working Group (IOWG)
information preparation of the battlespace
information presentation system
information requirement (IR)
Information Security Branch (INFOSEC)
information security (INFOSEC)
information security threat
information-sharing
information strategy
information support
information system (IS)
information warfare (IW)
information warfare soldiers
informer
InformNapalm investigators
InformNapalm volunteer intelligence community
infrared acquisition system
infrared beam
infrared CO2 laser
infrared devices
infrared equipment
infrared homing system
infrared imaging sensor
infrared intelligence (IRINT)
infrared (IR)
infrared / negative ultraviolet (IR/NUV) seeking
infrared night vision observation device
infrared radiation
infrared receiver
infrared sensor
infrared target-sensor
infrasonic
infrasonic weapon
infrasound
infrastructure
Infrastructure and Defense Manpower Committee (NATO)
Infrastructure and Facilities Management
Infrastructure Committee (IC, NATO)
infrastructure engineering for logistics (IEL)
ingress point (IP)
inhabited locality
inhabited weapon
inhalation anthrax
inhibitor
initial airhead
initial assault
initial assault landing
initial data
initial element
initial-entry force
initial-entry training (IET)
initial geodetic data
initial nuclear radiation
initial operational capability (IOC)
initial operational test and evaluation (IOT&E)
initial path sweeping
initial period of war
initial point (IP)
initial radiation
initial railway
initial sight setting
initial situation
initial training
initial velocity
initiate
initiate a mission
initiate a request
initiating directive
initiating mechanism
initiating system
initiator (explosives)
inject (exercise incident)
injector
injury criteria
inland
inland surface transport
inlet
inlet duct
inlet guide vanes
inlet hose
inlet port
inlet valve
innate aggressive drives
inner bottom
inner cone
inner cordon
inner hull
innocent passage
inorganic oxidizer
input
input data strobe
input/output device (i/o)
insect repellent
insecure
insensitive explosive
insertion of troops
insertion points
inset (cart.)
inshore fire support
inshore fire support ship
inshore patrol
inshore underseas warfare group
inside framework
insignia
insolubility in water
inspect
inspected state party (ISP)
inspection and diagnostic system
inspection checklist
inspection of troops
inspection party
inspection satellite
inspection team
inspection team leader (ITL)
inspectors general
installation
installation kit
instantaneous burst
instantaneous detonating fuse
Institute for the Study of War (ISW)
institution building
institutional Army
instruct
instruction
instructor
instrument panel
instrumentation
insubordinate conduct
insubordinate language
insubordination
insulate
insulating casing
insulating oil
insulation
insurgency
insurgent
insurrection
intact
intake capacity
intake manifold
intake port
intake silencer
intake stroke
intake valve
integral levelling equipment
integrated act of firing
integrated air defense system
integrated command structure
integrated engagement-sighting system
integrated logistic support (ILS)
integrated military command of NATO
integrated military structure
Integrated Modular Unmanned Ground System (iMUGS)
Integrated Priority List (IPL)
Integrated Product Team (IPT)
integrated scenario development
integrated sight unit
integrated staff
integrated unit
integration
integrity
integrity of the defensive system
integrity of the personality (PTSD)
intelligence acquisition phase
intelligence agencies
intelligence agency
intelligence analysis
intelligence analyst
intelligence and electronic warfare (IEW)
intelligence and electronic warfare (IEW) support
intelligence annex
intelligence annex to operation order
intelligence briefing
intelligence collection
intelligence community
intelligence cycle
intelligence data
intelligence disciplines
Intelligence Division (IMS)
intelligence-driven operation
intelligence eavesdropping / wiretap
intelligence estimate
intelligence exchange
intelligence file
intelligence fusion
intelligence gathering
intelligence gathering means
intelligence information
intelligence (Int., INTEL, INT)
intelligence-led operation
intelligence liaison unit (ILU)
intelligence officer (J2/G2/S2)
intelligence operation
intelligence photography
intelligence picture
intelligence police
intelligence preparation of the battlespace (IPB)
intelligence preparation of the environment (IPE) 
intelligence report
intelligence requirements
intelligence section (G2)
intelligence section (int sec, J2/G2/S2)
intelligence service
intelligence sharing
intelligence staff officer (brigade, battalion & armored cavalry units level) (S2)
intelligence summary
intelligence support
intelligence-supported operation
intelligence, surveillance, and reconnaissance (ISR)
intelligence, surveillance, target acquisition, and reconnaissance (ISTAR)
intelligence targeting
intended target
intensity mine circuit
intent
inter-agency cooperation
inter-chart relationship diagram (cart.)
inter-look dormant period (mines)
inter-theatre
interacting nuclei
interaction
interagency coordination
intercept
intercept equipment
intercept flight path
intercepted vessel
interception
interception of bombers
interceptor
interceptor combat load
interceptor guidance system
interceptor launch position
interceptor missile
interceptor system
interchangeability
interchangeability of supplies
interchangeable
interchangeable fuel
intercommunication system (intercom)
intercontinental ballistic missile (ICBM)
intercontinental missile
intercontinental range
interdiction
interdiction and disruption campaign (naut.)
interdiction barrage
interdiction mission
interdiction of sources of financing
interdiction of supplies
interdictory fire
interdisciplinary approach
interface control working group (ICWG)
interfaced pair
interference
interference in internal affairs
interim government
interim operational capability (IOC)
interior
interior ballistics (internal ballistics)
interior bay
interior bay bridge superstructure
interior guard duty
interior lines (див. exterior lines)
interior lines of communication
interior of ship
interlocking
interlocking arcs of fire
interlocking fire
interlocking institutions
intermediate agent
intermediate contour line
intermediate frequency
intermediate headquarters
intermediate location
intermediate maintenance
intermediate-range ballistic missile (IRBM)
intermediate scale
intermediate section
intermediate staging base
intermediate support
intermittent lake / pond / stream
intern
internal armed conflict
internal arrangement
internal combustion
internal combustion engine (IC eng)
internal guidance system
internal security
internal security units
internal threat
internal waters
internally displaced person (IDP)
international agencies and alliances
International Air Transport Association (IATA)
international alliance
international arrest warrant
International Civil Aviation Organization (ICAO)
international civil presence
International Civilian Mission in Haïti (MICIVIH)
International Committee of the Red Cross (ICRC)
international community
international conspiracy
International Convention on the Conduct of Warfare
international date line
international disaster relief
International Disaster Relief Operation (IDRO)
international humanitarian law (See international law of armed conflict)
International Independent Investigation Commission - Lebanon (UNIIIC)
international law of armed conflict
international military inspection
international military presence
International Military Staff (IMS)
International Military Tribunal (IMT)
international mine action standards (IMAS)
international police force
International Police Task Force
International Recommended Transit Corridor (IRTC)
international rules in force
international sanctions regime
international security
international security mechanism
international security policy
international security presence
international security system
international shipping
international staff
International Staff (IS)
international strait
international terrorism
International Traffic in Arms Regulations (ITAR)
international waters
internment
internment camp
interoperability
Interoperability Action Team (IAT)
Interoperability Integrated Product Team (I-IPT)
interoperability objectives
interoperability profile
interoperable
interposition force
interposition operation
interpretation
Interpretation Service (NATO IS)
interpreter
interrogate
interrogation
interrogation officer
interrogation technique
interrogation training
interrogator
interrupt the enemy's line of retreat
interrupter switch
intersection
intersperse
interstate conflicts
interval
interval of grid lines
intervalometer
intervasion (intervention + invasion)
intervene with armed force
intervention
intervisible
intimidate the population
intimidation campaign
into the wind
intolerable losses
intra-national terrorism
intra-state (armed) conflict
intra-theatre airlift system (ITAS)
intrastate conflicts
intrinsic element
introduction of martial law
intrusion
intuitive faculty
inundation
inundation area
invade
invaders
invasion
invasion forces
inventory control center
inventory control point (ICP)
inventory management
inventory status
inventory value
inverted wedge formation
invest
investigating officer
investigation
investigation and intelligence unit (law enforcement)
invincibility
invincible
inviolability
invisible
invisible detection
invisible light aid
invisible light equipment
invisible marker
invisible tear gas
invite an attack
invite destruction
invite disaster
invocation of Article 5
involuntary absence without leave
IR dome
IRIS-T SLM (Infra Red Imaging System Tail/Thrust Vector-Controlled)
Iron Beam
iron bomb
Iron Dome
iron ration
iron sight
irradiation
irregular
irregular enemy
irregular forces
irregular outer edge
irregular terrain
irregular troops
irregular warfare
irrepairable
irreplaceable/ irretrievable losses
irritant action/effect
irritant (chemical agent/gas)
irritate
IRTC Coordinator
Islamic State (IS)
island
island of resistance
ISO container
isogriv (cart.)
isolation pod (CBRN)
isotope
isotropic radiators
issue
issue allowance
issue clothing
issue slip
issue-type
issued (to)
item
item identification (logistics)
item of issue
item of uniform
items of (material) support
items of supply (IoS)
Iveco LMV (Light Multirole Vehicle)