Picture describing. Some more vocabulary

Setting
Outdoors
Indoors
In the open
at a military base
Onboard a plane/ carrier
In a mountainous area

People
The military
Military people/men
servicemen
Recruits/ privates/ officers/ generals/ higher ranks/ commanders
subordinates
Pilots/ marines/ navies/ navigators/ miners/ paratroopers/ artillerymen
Signallers/ communications men

People. Appearance
wearing dress/ combat/ mess uniform
Neat/ untidy
Caucasian/ Asian/of African origin
With dark/ white complexion
Of athletic build/ muscular
Physically fit

People. Mood
busy
concentrated
relaxed
preoccupied
sullen
Satisfied
At a loss
Embarrassed
(self-)confident
Tired
Exhausted
Energetic
Cheerful
Optimistic
motivated