機器
action
aggression
airplane
armed
armored
army
awe
background
battle
battlefield
blast
bomb
bombardment
bombing
camouflage
caterpillar
cloud
conflict
danger
disaster
dogfight
exploding
explosive
fighting
fire
flash
flying
forces
german
gun
heavy
history
image
land
military
old
oldfashioned
outdoors
person
power
propeller
smoke
tank
turret
vehicle
view
violence
war
weapon
world