機器
aggression
aircraft
airplane
america
armed
armor
army
asia
aviation
battle
conflict
crisis
desert
east
economic
energy
fighter
finance
financial
flight
fly
furious
gun
gunner
jet
leadership
marines
men
middle
military
modern
natural
navigation
oil
patriotism
peace
pilot
plane
power
resources
security
silhouette
sky
soldier
sunset
tank
training
war
weapon