World War I: Causes and Effects

Mission Brief #57

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Walk into the past. Find out who, what, and why.

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What seemed obvious then is often shocking now (and vice versa).

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World War I began in 1914 and lasted until 1918. It was a global conflict mainly involving countries in Europe. Some of the main causes of the war included disagreements over land and alliances between countries. The war had many effects, such as changes in borders and the creation of new countries after it ended.

Key facts

Remember these

1World War I started in 1914 and ended in 1918.
2Disagreements over land were a major cause of the war.
3The war led to the creation of new countries.

Timeline · 1 of 2

When it happened

1914
Archduke Franz Ferdinand is assassinated in Sarajevo
1914
Alliances pull Europe's powers into war
1917
The United States enters the war
1918
An armistice ends the fighting

Timeline · 2 of 2

1919
The Treaty of Versailles is signed

Then & Now

People still argue about this. Now you'll see why.

Question 1 of 2

What year did World War I start?

How sure?😐 maybe

Question 2 of 2

What was one cause of World War I?

How sure?😐 maybe

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