- powder-chamber
- position
- preparative
- preparedness
- predictor
- present
- prisoner
- protective
- proximity fuse
- pull-through
- quarter
- push
- push-up
- quick-firer
- quick step
- quick-firing
- quick-time
- rafale
- railhead
- ranker
- rate
- raut
- re-engage
- react
- reaction
- rearward
- rebuff
- rake
- rank
- rear
- rear-admiral
- rearguard
- recall
- range
- ranger
- ravelin
- recce
- reconnaissance
- reconversion
- recreation
- ready
- rear-rank
- recede
- reconnoitre
- redcap
- redoubt
- regiment
- regimental
- reinforce
- rejoin
- relief troops
- release
- regimentation
- remount
- rendezvous
- reinforcement
- report centre
- repulse
- reserve
- retaining force
- retreat
- retrenchment
- reveille
- rifle-pit
- rifleman
- review
- retire
- retirement
- retrograde
- retrogressive
- ridden
- retrogradation
- return
- ride
- rifle-grenade
- right-about
- rookie
- round
- rooty
- roster
- rough-rider
- rout
- rouse
- rush
- rooky
- route
- route-march
- salute
- saddler
- sand-table
- sap
- saturation bombing
- sconce
- scorch
- saturate
- scarf
- scope
- scarves
- sausage
- scout