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Archduke of Austria-Hungary Franz Ferdinand is assassinated in Sarajevo by Princip from the Black Hand group.
This later led to the Austria-Hungaria declaration of war on Serbia. -
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August 1 Germany declares war on Russia.
Germany, as an ally of Austria-Hungary, declares war on Russia due to their military mobilization. August 3 Germany declares war on France.
France was allied with Russia and Britain and Germany wants to invade them to seize land. August 4 Great Britain declares war on Germany after Germany did not guarantee to uphold Belgian sovereignty. -
Neutral Belgium is invaded by Germany as part of the Schlieffen Plan.
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During the Battle of Tannenberg, the Germany army achieves its greatest victory during the war on the Eastern Front
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The German advance into France is stopped during the First Battle of the Marne
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The usefulness of airplanes in war was appreciated for the first time
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The Germans create a submarine blockade around Great Britain, targeting any and all shipping.
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The Gallipoli Campaign starts after Winston Churchill states that capturing Constantinople is essential for the supply line between Russia and Britain
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Chemical weapons are used for the first time during the Battle of Ypres
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The German torpedoing of the American ship Lusitania causes widespread anger among the American population
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Italy declares war on Austria-Hungary (Switches sides from triple alliance to triple entente)
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Soldiers are pulled out of Gallipoli after the huge losses do not give way to any advances
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The longest battle of WW1 ends with an estimated one million casualties.
The battle was fought between German and French armies in North-Eastern France -
The Battle of the Somme ends with 1 million casualties but no breakthrough for the Allied powers. One of them most iconic battles of the first world war
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Germany declared unrestricted submarine warfare.
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The Siegfriedstellung (Hindenburg Line) was a German defensive position in World War I built during the winter of 1916–1917 on the Western Front from Arras to Laffaux, near Soissons on the Aisne.
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Tsar Nicholas II of Russia abdicates his throne for his son. This is considered to be the end of the Russian Empire after 196 years.
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On April 6, nited States was formally at war with Germany. Several key events leading up to this act included the sinking of the Lusitania in 1915, and the Zimmerman Telegram sent to Mexico by Germany in January 1917. The resumption of unrestricted submarine warfare by Germany on February 1, 1917 was the key event that made America join the war.
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Battle of Passchendaele also known as the Third Battle of Ypres. A campaign fought by the British and their allies against the German Empire.
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Armistice between Russia and Germany was signed. Between the representatives of the higher command of Russia on the one hand and of Bulgaria, Germany, Austria-Hungary, and Turkey on the other hand, for the purpose of achieving a lasting and honourable peace between both parties.
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Jerusalem was captured by Britain from the Turkish. Barely pausing for consolidation following the Battle of Mughar Ridge on 13 November 1917, British Commander-in-Chief Sir Edmund Allenby marched eastwards towards Jerusalem via the Judea Hills.
