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Assassination of archduke ferdinand
The assassination of Archduke Franz Ferdinand of Austria, heir presumptive to the Austro-Hungarian throne, and Franz Ferdinand's wife Sophie, Duchess of Hohenberg, occurred on 28 June 1914 in Sarajevo when they were mortally wounded by Gavrilo Princip. -
Austria-hungary declares war on serbia
On July 28, 1914, one month to the day after Archduke Franz Ferdinand of Austria and his wife were killed by a Serbian nationalist in Sarajevo, Austria-Hungary declares war on Serbia, effectively beginning the First World War. -
germany declars war on russia and france
Reacting to the Austrian attack on Serbia, Russia begins full mobilization of its troops. ... August 1, 1914 - Germany declares war on Russia. France and Belgium begin full mobilization. August 3, 1914 - Germany declares war on France, and invades neutral Belgium. (I split the difference to make it one event declared war on Russia on August 1st and France August 3rd) -
Christmas truce on the western front
The Christmas truce (German: Weihnachtsfrieden; French: Trêve de Noël) was a series of widespread but unofficial ceasefires along the Western Front of World War I around Christmas 1914. ... Soldiers were no longer amenable to truce by 1916. -
Allied naval attack on the Dardanelles
The Naval Operations in the Dardanelles Campaign took place against the Ottoman Empire during the First World War. Ships of the Royal Navy, French Marine Nationale, Imperial Russian Navy, and the Royal Australian Navy, attempted to force the defenses of the Dardanelles Straits. -
German gas attack at ypres
On this day in 1915, German forces shock Allied soldiers along the Western Front by firing more than 150 tons of lethal chlorine gas against two French colonial divisions at Ypres in Belgium. ... Now referred to as the Second Battle of Ypres, the offensive began with the usual artillery bombardment of the enemy's line. -
Sinking of the lusitania
The sinking of the Cunard ocean liner RMS Lusitania occurred on Friday, 7 May 1915 during the First World War, as Germany waged submarine warfare against the United Kingdom which had implemented a naval blockade of Germany. The ship was identified and torpedoed by the German U-boat U-20 and sank in 18 minutes. -
Italy declares war on Austria-Hungary
Italy declares war on Austria-Hungary, entering World War I on the side of the Allies—Britain, France, and Russia. ... The decision to join the fray on the side of the Allies was based largely on the assurances Italy received in the Treaty of London, signed in April 1915. -
First zeppelin raid on London
As London settled into sleep on May 31, 1915, a monstrous airborne machine blotted out the stars of the British night. Using the glow of the River Thames as a guide, the biggest flying vessel ever constructed droned over the city. As a trap door opened from underneath the futuristic 650-foot-long craft, German troops sent 90 incendiary bombs and 30 grenades plummeting from the dark menace.
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First tank demonstrated to British military leaders
The British developed the tank in response to the trench warfare of World War I. In 1914, a British army colonel named Ernest Swinton and William Hankey, secretary of the Committee for Imperial Defence, championed the idea of an armored vehicle with conveyor-belt-like tracks over its wheels that could break through the front lines. -
Zimmermann telegram intercepted by britain
The Zimmermann Telegram was a secret diplomatic communication issued from the German Foreign Office in January 1917 that proposed a military alliance between Germany and Mexico.
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United states declares war on Germany
On April 2, 1917, President Woodrow Wilson went before a joint session of Congress to request a declaration of war against Germany. -
United States enters war
On April 6, 1917, the U.S. joined its allies--Britain, France, and Russia--to fight in World War I. Under the command of Major General John J. Pershing, more than 2 million U.S. soldiers fought on battlefields in France. Many Americans were not in favor of the U.S. entering the war and wanted to remain neutral. -
French tanks used for the first time in war
The British Army this week used tanks for the first time in battle in an attempt to break the stalemate in the Battle of the Somme. -
Selective service act
the Selective Service Act of 1917 or Selective Draft Act ( authorized the United States federal government to raise a national army for service in World War I through conscription.
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Greece declares war on central powers
Greece declares war on Central Powers. On this day in 1917, several weeks after King Constantine I abdicates his throne in Athens under pressure from the Allies, Greece declares war on the Central Powers, ending three years of neutrality by entering World War I alongside Britain, France, Russia, and Italy. -
Allied forces breakthrough at Albert
The Allied preparatory artillery bombardment commenced on 24 June and the Anglo-French infantry attacked on 1 July, on the south bank from Foucaucourt to the Somme and from the Somme north to Gommecourt, 2 miles beyond Serre. The French Sixth Army and the right wing of the British Fourth Army inflicted a considerable defeat on the German 2nd Army but from the Albert–Bapaume road to Gommecourt -
Allied forces capture the Hindenburg line
Allied forces break through the Hindenburg Line. After a 56-hour-long bombardment, Allied forces breach the so-called Hindenburg Line, the last line of German defenses on the Western Front during World War I -
Paris peace conference
The Paris Peace Conference was an international meeting convened in January 1919 at Versailles just outside Paris. The purpose of the meeting was to establish the terms of peace after World War. -
treaty of versailles is signed
The Treaty of Versailles was the most important of the peace treaties that brought World War I to an end. The Treaty ended the state of war between Germany and the Allied Powers.
