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

    Oct 29, 2009 · World War I started in 1914, after the assassination of Archduke Franz Ferdinand, and ended in 1918. During the confl...

  2. World War I: Causes and Timeline | HISTORY

    World War I was fought from 1914 to 1918. Learn more about World War I combatants, battles and generals, and what cau...

  3. World War I Timeline: Battles & Major Events | HISTORY

    Apr 8, 2021 · This World War I timeline of battles outlines the most important engagements of the 1914-1918 war, from the first Bat...

  4. 8 Events that Led to World War I - HISTORY

    Apr 6, 2021 · Imperialism, nationalistic pride and mutual alliances all played a part in building tensions that would erupt into war.

  5. The United States officially enters World War I - HISTORY

    Feb 9, 2010 · When World War I erupted in 1914, President Woodrow Wilson pledged neutrality for the United States, a position that the vast majority of Americans favored. Britain, however, …

  6. Why Did the US Enter World War I? | HISTORY

    Apr 6, 2017 · The United States entered World War I in 1917, following the sinking of the British ocean liner Lusitania and the sho...

  7. Armistice Day: World War I ends | November 11, 1918 | HISTORY

    Mar 10, 2010 · At the 11th hour on the 11th day of the 11th month of 1918, World War I ends. At 5 a.m. that morning, Germany signed ...

  8. How Many People Died in World War I? - HISTORY

    Apr 19, 2023 · Major powers such as Britain, France, the U.S. and Germany kept detailed records of the war’s human cost. But the carnage of World War I was so extreme and pervasive, and …

  9. What was the Zimmermann Telegram? - HISTORY

    May 21, 2014 · Most historians agree that American involvement in World War I was inevitable by early 1917, but the march to war was...

  10. How German U-Boats Were Used in WWI—And Perfected in WWII

    Mar 21, 2022 · After terrorizing trans-Atlantic ships in World War I, German U-boats grew even more fearsome in World War II.