Overview
World War I was the first major world-wide modern war. Learn about the outbreak and major battles of World War I. See more »
what's inside: world war i
The events leading up to the start of World War I depict a time in the history of the world where tensions between developing nations started to clash. This section contains information about the events leading up to the start of World War I.
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Background
The sinking of the Lusitania was one of the events that brought the United States into World War I. The topics in this section cover some of the major concepts and events related to the start of the First World War. See more »
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Biographies
Some of the most famous people that were related to World War I include Earl Haig and Sir Henry Wilson. The topics in this section include biographies about some of the most important people that had a role in World War I. See more »
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World War I
World War I was a great armed conflict that lasted from 1914 to 1918. Until World War II, it was often called the Great War because it was the most destructive and widespread war the world had ever seen.
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What was the Christmas Truce?
World War I lasted more than four horrific years and took the lives of 8.5 million people. So why did soldiers spontaneously put down their guns and shake hands? And why did they start fighting again?
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