World War 1

Ferdinand was assassanated

Jun 28, 1914

Francis Ferdidnand was assassinated on the Serbian holiday, known as St. Vitus Day. Because Ferdidnand was the heir to the throne of Austria-Hungary, his assassination was the the spark that set off World War 1.

Austria Gives an Ultimatum

Jul 23, 1914

Austria demands that Serbia ends all anti-Austrian activities, and let Austria handle the murder investigations; with only 48 hours to meet these terms.

Austria Declares War on Serbia

Jul 28, 1914

Germany Declares War on Russia

Aug 1, 1914

Russian Retreat

Apr 24, 1915

Lusitania Sinks

May 7, 1915

Germany launches a torpedo attack on a British ocean liner. 120 Americans were killed when the ship sunk.

The Sussex Pledge

Mar 1, 1916

Germany sinks another ship, the Sussex. The U.S. threatens to declare war if another ship is sunk.

Zimmerman Note

Mar 1, 1917

The Zimmerman Not was a secret telegram proposing a German-Mexican alliance in case of a war between Germany and America.

US Enters WW1

Apr 23, 1917

Treaty of Brest-Litovsk

Mar 23, 1918

Russia lost Finland, Poland, Latvia, Lithuania, and Estonia.