In the heart of the earth, a fire did stir, igniting a war that would change the world—what event set the stage for a century-long conflict?

Category: History · Difficulty: expert

Hint: It started with a shot heard around the world.

Answer

The First World War

Explanation

The assassination of Archduke Franz Ferdinand in 1914 triggered a series of alliances leading to World War I.

This is a expert history riddle — one of the harder riddles here. The answer is The First World War.

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