Air law

Central powers: Germany, Austria-Hungary and the Ottoman Empire fighting agains allied powers.

Conscript: Men fourced by law to serve in an armed Force.

No mans land: An occupied the losing country had to pay.

Reparation: The compensation the losing country had to pay.

French warfare: The warfare between opposing armies who attack, conteratack and defend themselves from trenches due in the ground.

Tanks: Invented by the British it was a good invention to end the trench warfare, so that they could move to the enemies side in a secure way.

Steel helmet: to decrease the number of death and injured by bombs.

Uniforms: Camouflage colour.

Recruitment: In most of the countries the conscript started with the first World War, due to the impossibility of having as many volunteer soldiers as need.