Show:
THE EMPIRE
WEAPONS
COMBAT
MOVING FORCES
INTELLIGENCE
100
a group of countries under the rule of one country 
empire
100
the bullets or shells shot from a weapon
ammunition
100
a type of fighting in which two enemy armies dig long, deep ditches called trenches facing each other and fight from these trenches
trench warfare
100
the military line or part of an army that is closest to the enemy
frontline
100
any information that is valuable to a nation's government or military
intel
200
a nation that has other nations under its control
mother country
200
a collection of weapons and military equipment stored by a nation
arsenal
200
combat or fighting with military airplanes
dogfight
200
to move troops into position for military action or to send troops into war
deployed:  
200
the act of carefully watching someone or something especially in order to prevent or detect a crime
surveillance
300
an area under the control of a mother country, whose purpose is to provide resources to help the mother country
colony
300
a large gun that is used to fire shells high into the air for a short distance
howitzer
300
attacking an enemy
offensive
300
going into another nation with your military with the intent to conquer or take over
invasion
300
the things that are done to find out secrets from enemies or competitors or the activity of spying
espionage
400
a region or area of land under the authority or protection of a nation
territory
400
a bomb that is placed in the ground or in water and that explodes when it is touched
mine
400
an attack made in order to defend against an enemy or opponent
counter-offensive
400
people and supplies that are sent to help or support an army or military force in a conflict, battle, or war
reinforcements
400
exploring or investigating enemy territory to gain military information
reconnaissance
500
to make a region or territory a part of your nation
annexed
500
a cigar-shaped missile designed to be fired from an airplane, ship, or submarine to explode on reaching a target
torpedo
500
a region in which active warfare is taking place in two places at one time
two front war
500
bringing together military forces to prepare for war
mobilized
500
someone who is not wild or savage; an educated person who uses self control and understands their culture
civilized