- hinterland
- hitch
- hold
- horse-artillery
- house
- howitzer
- hut
- identification disk
- hutment
- identification tag
- identity disk
- inactivate
- inactivation
- incendiary
- incident
- infantry
- indian file
- infantryman
- infiltration
- initiative
- inspect
- interdiction
- intercepter
- interception
- interceptor
- interdict
- interval
- intervallic
- intrench
- intruder
- invest
- intrenchment
- investment
- irregular
- iron rations
- issue
- jonny raw
- jum-off
- jump
- jab
- jack
- joe
- join
- k-ration
- jink
- joint staff
- kangaroo
- keep
- kite
- kite-balloon
- kneeling position
- kept
- kipper
- laager
- lance-corporal
- lance-sergeant
- land-force
- land-forces
- lean
- leant
- leave
- left
- legionnaire
- levy
- lieutenant general
- legionary
- liaison
- lieutenant
- lieutenant colonel
- lieutenant-commander
- limber
- line
- line-officer
- listening post
- lock
- lodgement
- lodgment
- looie
- lock step
- logistics
- long tom
- lunette
- major-generalsy
- major
- major-general
- major-generalship
- majority
- mantlet
- march
- mark
- marshalship
- manoeuvre
- mantelet
- manual
- marshal
- marshalcy
- mask
- masked
- mass
- master sergeant