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  1. Mortes civis: 3 700 000. A Primeira Guerra Mundial (também conhecida como Grande Guerra ou Guerra das Guerras, até o início da Segunda Guerra Mundial) foi um conflito bélico global centrado na Europa, que começou em 28 de julho de 1914 e durou até 11 de novembro de 1918. A guerra envolveu todas as grandes potências do mundo, [ 4] que se ...

  2. en.wikipedia.org › wiki › World_War_IWorld War I - Wikipedia

    World War I or the First World War (28 July 1914 – 11 November 1918) was a global conflict between two coalitions: the Allies and the Central Powers. Fighting took place throughout Europe, the Middle East, Africa, the Pacific, and parts of Asia.

    • Overview
    • The outbreak of war

    World War I began after the assassination of Austrian archduke Franz Ferdinand by South Slav nationalist Gavrilo Princip on June 28, 1914.

    Read more below: The outbreak of war

    Balkan Wars

    Read more about why the Balkans became the “powder keg of Europe.”

    What countries fought in World War I?

    The war pitted the Central Powers (mainly Germany, Austria-Hungary, and Turkey) against the Allies (mainly France, Great Britain, Russia, Italy, Japan, and, from 1917, the United States).

    With Serbia already much aggrandized by the two Balkan Wars (1912–13, 1913), Serbian nationalists turned their attention back to the idea of “liberating” the South Slavs of Austria-Hungary. Colonel Dragutin Dimitrijević, head of Serbia’s military intelligence, was also, under the alias “Apis,” head of the secret society Union or Death, pledged to the pursuit of this pan-Serbian ambition. Believing that the Serbs’ cause would be served by the death of the Austrian archduke Franz Ferdinand, heir presumptive to the Austrian emperor Franz Joseph, and learning that the Archduke was about to visit Bosnia on a tour of military inspection, Apis plotted his assassination. Nikola Pašić, the Serbian prime minister and an enemy of Apis, heard of the plot and warned the Austrian government of it, but his message was too cautiously worded to be understood.

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    At 11:15 am on June 28, 1914, in the Bosnian capital, Sarajevo, Franz Ferdinand and his morganatic wife, Sophie, duchess of Hohenberg, were shot dead by a Bosnian Serb, Gavrilo Princip. The chief of the Austro-Hungarian general staff, Franz, Graf (count) Conrad von Hötzendorf, and the foreign minister, Leopold, Graf von Berchtold, saw the crime as the occasion for measures to humiliate Serbia and so to enhance Austria-Hungary’s prestige in the Balkans. Conrad had already (October 1913) been assured by William II of Germany’s support if Austria-Hungary should start a preventive war against Serbia. This assurance was confirmed in the week following the assassination, before William, on July 6, set off upon his annual cruise to the North Cape, off Norway.

    The Austrians decided to present an unacceptable ultimatum to Serbia and then to declare war, relying on Germany to deter Russia from intervention. Though the terms of the ultimatum were finally approved on July 19, its delivery was postponed to the evening of July 23, since by that time the French president, Raymond Poincaré, and his premier, René Viviani, who had set off on a state visit to Russia on July 15, would be on their way home and therefore unable to concert an immediate reaction with their Russian allies. When the delivery was announced, on July 24, Russia declared that Austria-Hungary must not be allowed to crush Serbia.

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  3. Champagne-Marne Offensive (consisting of the Fourth Battle of Champagne and the Battle of the Mountain of Reims), a phase of the Second Battle of the Marne. last phase of the Spring Offensive and last German offensive of World War I.

    Dates
    Theater/front/campaign
    Events
    June 28
    Assassination of Archduke Franz ...
    July 5
    Austria-Hungary seeks German support for ...
    July 23
    Beginning of the "Black Week".
    July 24
    Kingdom of Serbia mobilizes, expecting ...
  4. United States in World War I. Two American soldiers run towards a bunker. The United States declared war on the German Empire on April 6, 1917, nearly three years after World War I started. A ceasefire and armistice were declared on November 11, 1918.

  5. World War I began in the Balkans on July 28, 1914, and hostilities ended on November 11, 1918, leaving 17 million dead and 25 million wounded. Moreover, the Russian Civil War can in many ways be considered a continuation of World War I, as can various other conflicts in the direct aftermath of 1918.

  6. This list of military engagements of World War I covers terrestrial, maritime, and aerial conflicts, including campaigns, operations, defensive positions, and sieges.