There was tension between European powers so that when Archduke Franz Ferdinand of Austria-Hungary was assassinated, war broke out.
Both sides agreed to no fighting and joined each other in no man's land and spent Christmas together.
Any and all vessels around Great Britain were targets.
Letter sent by Germany to get Mexico to join in on the war in an alliance.
The U.S. joined its allies when Germany decided to resume the policy of unrestricted submarine warfare and when Britain intercepted the “Zimmerman Letter”.
A statement of principles for peace to be used for peace negotiations to end the war.
Series of German attacks on the Western Front.
Largest battle the U.S. participated in at the time and was one of the series of allied attacks to end the war.
The peace treaty that officially ended the war and created more conflict with Germany for starting the war.