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  1. World War I - Wikipedia

    The Bolsheviks signed an armistice followed by a separate peace shortly after their armed seizure of power. ^ Often abbreviated as WWI or WW1 ^ Only the Triple Alliance was a formal "alliance"; the …

  2. World War I - Encyclopedia Britannica

    Nov 17, 2025 · World War I (1914–18) was an international conflict that embroiled most of the nations of Europe along with Russia, the U.S., the Middle East, and other regions. It led to the fall of four great …

  3. World War I: Summary, Causes & Facts | HISTORY

    Oct 29, 2009 · French soldiers in Verdun endure the horrors of trench warfare, a strategy that led to rampant disease, shell shock and mass casualties during WWI.

  4. The United States and the First World War - World War I Memorial (U.S ...

    Library of Congress image In the summer of 1914, the assassination of Archduke Franz Ferdinand, heir to the Austro-Hungarian Empire, ignited a continental war between the Central Powers of Germany, …

  5. World War I - Topics | Library of Congress

    Exhibition Echoes of the Great War: American Experiences of WWI Explore how Americans experienced the upheaval of world war—at home and abroad.

  6. About WWI - National WWI Museum and Memorial

    WWI Categories WWI Essentials Learn the essentials about World War I and understand the key events and impacts of the war.

  7. WORLD WAR I OVERVIEW - HISTORY CRUNCH

    World War I began in June of 1914, and is considered to have five major causes that led to the outbreak of the war. These five causes include the four long-term causes (militarism, alliances, imperialism …

  8. 1914-1918-Online. International Encyclopedia of the First World War …

    Explore the comprehensive, peer-reviewed "1914-1918-online" encyclopedia. Access 1,600+ articles on WWI from global experts.

  9. World War 1 Explained in Full — The War That Changed ... - YouTube

    2 days ago · World War One was not just a war.It was the moment the modern world was born in blood, mud, and fire.This complete World War 1 documentary takes you from the...

  10. CAUSES OF WORLD WAR I World War I occurred between July 1914 and November 11, 1918. By the end of the war, over 17 million people would be killed including over 100,000 American troops. The …