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Allied forces stopped the German advance toward Paris, ending hopes of a quick German victory. -
Assassination of Archduke Franz Ferdinand in Sarajevo -
Austria-Hungary declares war on Serbia (war begins) -
Failed Allied attempt to control the Dardanelles -
Battle of Verdun (Feb–Dec 1916): One of the longest and bloodiest WWI battles; France resisted German assault, symbolizing French determination. -
Battle of the Somme (July–Nov 1916): One of WWI’s bloodiest battles; huge losses for little gain on both sides. -
Russian Revolution (1917): Overthrew the tsar, led to Bolshevik rule, and started the world’s first communist state. -
The United States enters the war. -
Treaty of Versailles (1919): Ended WWI; blamed Germany, imposed heavy reparations, and redrew European borders. -
League of Nations (1919): First international organization aimed to maintain peace after WWI, but proved ineffective.