First World War Main Event( History of Europe)

1914-- Austrian Archduke Francis Ferdinand assassinated:  Archduke Ferdinand assassinated. On this day in 1914, Archduke Franz Ferdinand of Austria and his wife Sophie are shot to death by a Bosnian Serb nationalist during an official visit to the Bosnian capital of Sarajevo. The killings sparked a chain of events that led to the outbreak of World War I by early August.

World War-I begins: World War I began in 1914, after the assassination of Archduke Franz Ferdinand, and lasted until 1918. During the conflict, Germany, Austria-Hungary, Bulgaria and the Ottoman Empire (the Central Powers) fought against Great Britain, France, Russia, Italy, Romania, Japan and the United States (the Allied Powers).

First Battle of the Marne:  On September 9, the exhausted Germans began a fighting retreat to the Aisne River.

1915 : -First use of Poison gas by German:

On April 22, 1915, The first major gas attacked by the Germans, and it devastated the Allied line.

- Lusitania Sunk:  On May 7, 1915, less than a year after World War I (1914-18) erupted across Europe, a German U-boat torpedoed and sank the RMS Lusitania, a British ocean liner en route from New York to Liverpool, England.

1916:  Battle of Verdun: The Battle of Verdun in 1916 was the longest single battle of World War One.

-- Battle of Jutland: The Battle of Jutland was a naval battle fought by Britain's Royal Navy against the Imperial German Navy's.

1917:

--Russian Revolution: Russia signalled her withdrawal from World War One soon after the October Revolution of 1917, and the country turned in on itself with a bloody civil war between the Bolsheviks and the conservative White Guard.

--United States declares war:  On April 2, 1917, President Woodrow Wilson declared war against Germany

1918:

Russia Leaves the War: The Treaty of Brest-Litovsk was a peace treaty signed on 3 March 1918 between the new Bolshevik government of Russia and the Central Powers that ended Russia's participation in World War I.

Allies Advance: The Hundred Days Offensive (8 August to 11 November 1918) was an Allied offensive which ended the First World War.

1919: 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 at 11 a.m.– it was on the 11th hour of the 11th day of the 11th month.