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Archduke Francis Ferdinand, The heir to the Austro-Hungarian throne and his wife ,the Duchess of Hohenberg are killed by Gavrilo Princip.
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After the assassination of Archduke Franz Ferdinand and his wife Sophie, the Austro-Hungarian government declares war on Serbia. Immediately, and within a period of six days, European countries declare war upon one another.
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Tsar Nicholas II ordered mobilization of the Russian army. Two days later, Germany declared War on Russia.
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The Schlieffen Plan established that, in case of the outbreak of war, Germany would attack France first and then Russia.
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During the second month of World War I, the first battle of the Masurian lakes was a German offense in the eastern front. Germans won and Russians were ejected from east Prussia. -
The RMS Lusitania was a British-registered ocean liner that was torpedoed by an Imperial German Navy U-boat during World War I
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World War I engagement in which the French repulsed a major German offensive. It was one of the longest, bloodiest, and most-ferocious battles of the war.
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Rasputin was killed in the basement of the Moika Palace, the Saint Petersburg residence of Prince Felix Yussupov, the richest man in Russia and the husband of the Czar’s only niece, Irina. His battered body was discovered in the Neva River a few days later.
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British signals intelligence intercepted and decrypted a coded German telegram from German Foreign Secretary Arthur Zimmermann that was intended for Germany's ambassador to Mexico.
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President Woodrow Wilson went before a session of congress to request a declaration of war against Germany. Wilsons reasons for declaring war were Wilson cited Germany’s violation of its pledge to suspend unrestricted submarine warfare in the North Atlantic and the Mediterranean, as well as its attempts to entice Mexico into an alliance against the United States. -
The treaty of Brest-Litovsk was a separate peace treaty, between Russia and the central powers, Which ended Russia's participation in World War I. -
The last major German offense on the western front during World War I. The Germans suffered approximately 168,000 casualties, while the Allied forces lost 120,000 military members, Eventually the allies won when German commanders demanded a retreat. -
After more than four years of fighting and the loss of millions of lives, the guns on the Western Front fell silent. Although fighting continued elsewhere, the armistice between Germany and the Allies was the first step to ending World War I.
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The Paris Peace Conference was the formal meeting in 1919 and 1920 of the victorious Allies after the end of World War I to set the peace terms for the defeated Central Powers.
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The league of nations from 1920-1946 was the first intergovernmental organization established to promote international cooperation and to achieve international peach and security.
