Why Did World War I Happen?

In this free resource on World War I, explore the causes and effects of the Great War to understand how the conflict shaped world history.

World War I Begins - Division of Historical and Cultural Affairs - State of Delaware

World War I - Wikipedia

Long-term Causes of World War I - HISTORY CRUNCH - History Articles, Biographies, Infographics, Resources and More

The First World War - Lagan History Zone

The Top 5 Causes of World War I

Why Did the First World War Start? - Start of WW1 KS2

Causes of World War 1, World War 1 Revision

Causes of the First World War

Beginning of World War II (video)