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Assassination of Franz Ferdinand
The assassination of Archduke Franz Ferdinand of Austria, heir presumptive to the Austro-Hungarian throne, occurred on 28 June 1914 in Sarajevo. -
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the Great War
Archduke Franz Ferdinand, heir to the Austro-Hungarian Empire, was shot to death with his wife by the Bosnian Serb nationalist Gavrilo Princip in Sarajevo. This started the Great War. -
Kaiser declares "open season" on ships
In February 1915 the German government announced its solution to the problem -- unrestricted submarine warfare. The Germans realized they didn't have to capture a merchant ship, just sink it - crew and all. -
Lusitania sank
On the afternoon of May 7, 1915, the British ocean liner Lusitania is torpedoed without warning by a German submarine off the south coast of Ireland. Within 20 minutes, the vessel sank into the Celtic Sea. Of 1,959 passengers and crew, 1,198 people were drowned, including 128 Americans. -
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Battle of Somme
The Battle of the Somme, also known as the Somme Offensive, was a battle of the First World War fought by the armies of the British and French empires against the German Empire. -
Wilson re-elected
Woodrow Wilson re-elected President of the United States with campaign slogan: "He kept us out of the war" -
Zimmerman note intercepted
In the telegram, intercepted and deciphered by British intelligence in January 1917, Zimmermann instructed the ambassador, Count Johann von Bernstorff, to offer significant financial aid to Mexico if it agreed to enter any future U.S-German conflict as a German ally. -
US declares war on Germany
On April 2, 1917, President Woodrow Wilson asked Congress for a declaration of war against Germany. On April 6, Congress granted the request and the United States was formally at war with Germany. -
Selective Service Act
Authorized the federal government to raise a national army for the American entry into World War I through the compulsory enlistment of people. -
Convoy System
British Royal Navy introduces a newly created convoy system, whereby all merchant ships crossing the Atlantic Ocean would travel in groups under the protection of the British. -
Espionage Act passed
The Espionage Act was passed by Congress in 1917 after the United States entered the First World War. It prescribed a $10,000 fine and 20 years' imprisonment for interfering with the recruiting of troops or the disclosure of information dealing with national defence. -
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Spanish Flu Epidemic
The 1918 flu pandemic was an unusually deadly influenza pandemic, the first of the two pandemics involving H1N1 influenza virus. 20-50 million people killed. -
Fourteen Points speech
Speech on War Aims and Peace Terms, President Wilson set down 14 points as a blueprint for world peace that was to be used for peace negotiations after World War I. -
Russia pulls out of the war
A group of Communists led by Vladimir Lenin, the Bolsheviks, overthrew the government in November 1917 and created a Communist government. Lenin wanted to concentrate on building up a communist state and wanted to pull Russia out of the war. -
Sedition Act passed
An Act of the United States Congress that extended the Espionage Act of 1917 to cover a broader range of offenses -
Germany signs armistice
the agreement that ended the fighting on the Western Front
