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Kaiser declares “open season” on ships
Germany uses u boats to sink all ships -
Assassination of Franz Ferdinand
The assassination of Archduke Franz Ferdinand of Austria, heir presumptive to the Austro-Hungarian throne, and his wife Sophie, Duchess of Hohenberg, occurred on 28 June 1914 in Sarajevo when they were mortally wounded by Gavrilo Princip -
Great War begins
The trigger for the war was the assassination of Archduke Franz Ferdinand of Austria, heir to the throne of Austria-Hungary, by Yugoslav nationalist Gavrilo Princip in Sarajevo on 28 June 1914. -
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. -
Wilson re-elected
The United States presidential election of 1916 was the 33rd quadrennial presidential election, held on Tuesday, November 7, 1916. Incumbent Democratic President Woodrow Wilson defeated Supreme Court Justice Charles Evans Hughes, the Republican candidate. -
Battle of the 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. -
Espionage Age passed
The Espionage Act of 1917 is a United States federal law passed on June 15, 1917, shortly after the U.S. entry into World War I. It has been amended numerous times over the years. It was originally found in Title 50 of the U.S. Code (War) but is now found under Title 18, Crime. -
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. -
Convoy system
On this day in 1917, driven by the spectacular success of the German U-boat submarines and their attacks on Allied and neutral ships at sea. -
Selective Service Act
The Selective Service Act or Selective Draft Act (Pub.L. 65–12, 40 Stat. 76, enacted May 18, 1917) authorized the United States federal government to raise a national army for service in World War I through conscription. -
Flu Epidemic
The 1918 flu pandemic was an unusually deadly influenza pandemic, the first of the two pandemics involving H1N1 influenza virus. -
Fourteen Points speech
The Fourteen Points was a statement of principles for peace that was to be used for peace negotiations in order to end World War I. The principles were outlined in a January 8, 1918 speech on war aims and peace terms to the United States Congress by President Woodrow Wilson. -
Russia pulls out of the war
The Treaty of Brest-Litovsk was a peace treaty signed on 3 March 1918 between the new Bolshevik government of Soviet Russia and the Central Powers (Germany, Austria-Hungary, Bulgaria, and the Ottoman Empire), that ended Russia's participation in World War I. -
Sedition Act passed
The Sedition Act of 1918 (Pub.L. 65–150, 40 Stat. 553, enacted May 16, 1918) was an Act of the United States Congress that extended the Espionage Act of 1917 to cover a broader range of offenses, notably speech and the expression of opinion that cast the government or the war effort in a negative light or interfered -
Germany signs armistice
On Nov. 11, 1918, fighting in World War I came to an end following the signing of an armistice between the Allies and Germany that called for a ceasefire effective at 11 a.m.– it was on the 11th hour of the 11th day of the 11th month. -
US declares war on Germany
On 11 December 1941, four days after the Japanese attack on Pearl Harbor and the United States declaration of war against the Japanese Empire, Nazi Germany declared war against the United States, in response to what was claimed to be a series of provocations by the United States government when the US