A war that was fought between 1914-1918

a policy of extending a country's power and land. This was one of the causes of WWI

Patriotic feelings, principles, or efforts

the belief or desire of a government or people that a country should maintain a strong military capability

an archduke that was assassinated by a serbian nationalist

A peace treaty that ended world war I

and alliance between Germany, Austria-hungary, and Italy

a type of warfare in which opposing troops fight each other from trenches  

nformation, especially of a biased or misleading nature, used to promote or publicize a particular political cause or point of view.

poisonous gas or vapor, used especially to disable or kill an enemy in warfare