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Franz Ferdinand and his wife, Sophie the Duchess of Hohenburg, are killed by Bosnian Serb nationalist Gavrilo Princip. The Austrian government suspects that Serbia is responsible.
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After the Austrian government accused Serbia of assisting in the Archduke's death, they officially declared war.
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Germany sees a military advantage on the western front and decides to take over neutral Belguim on their way to France.
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Outraged by the invasion of Belguim, Britain joines the war on the side of the Allies.
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The Russians had a major loss at Tannenburg which drove the Eastern Front back into Russian Territory.
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Had the Ottomans joined the Allies then the Central Powers would have had to fight a three front war.
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Both sides of the war used poison gass to choke the enemies in the trenches on the western front.
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Germany used baloon zeppelins in order to fly above and drop bombs on Britains coast.
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German U-Boats blockade supplies from britain and the other allies.
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German U-Boats sink a passenger ship with a bunch of Americans on it.
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Italy decided to join in the war efforts on the side of the Allies extending the Western Front much further south.
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Britain was the first country in the war to use armoured tanks to engage in combat on either front.
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A revolt from the south greatly weakens the Ottoman Empire
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The 8 month battle over the Dardenelles is finished leaving the Central Powers Victorious.
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People revolt in Russia causing the tsar to step down
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America joins the war on the side of the Allies
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Italy suffers a big loss at Caporetto effectively taking them out of the war.
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American troops provide a large push against German forces.
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Russia officially drops out of the war.
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The treaty of versailles is signed and the war is officially over.
