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Assassination of Archduke Franz Ferdinand
A member of Austrian royalty is assassinated by Gavrillo Princip, a member for the Black Hand. -
Austria-Hungary declares war on Serbia
A month after the Archduke's assassination, Austria-Hungary declares war on Serbia. -
Germany declares war on Russia
Germany declares war on Russia, then France just two days after. -
Great Britain declares war on Germany
Britain jumps to defend its allies. -
Lusitania sinks
British ship Lusitania is sunken by German U-boats. Both British and United States citizens are killed. -
Sussex Pledge
Germany agrees to cease unrestricted submarine warfare in order to keep the United States out of Europe. -
Zimmerman Note
Germany's attempt to make Mexico go to war with the United States. Interc epted by Great Britain. -
United States declares war on Germany
After the sinking of 3 USA merchant ships, President Wilson decides it's time to go to war againt Germany. -
American troops arrive in France
After the use of the Convoy System, US troops arrive in France to aid in the war. -
Germany retreats
American advances cause Germany to retreat from Paris.
