character: Qin Dynasty
topic: The Qin Dynasty was the first to connect several walls to form a unified Great Wall, helping to protect against invasions.
grade: 4
subject: Social Studies
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character: Han Dynasty
topic: The Han Dynasty expanded the Great Wall further west, increasing trade along the Silk Road and improving defense.
grade: 4
subject: Social Studies
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character: Ming Dynasty
topic: The Ming Dynasty reinforced and rebuilt large parts of the Great Wall, creating the structure we see today to defend against Mongolian invasions.
grade: 4
subject: Social Studies
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character: Sui Dynasty
topic: The Sui Dynasty briefly improved sections of the wall but focused more on uniting China and developing infrastructure.
grade: 4
subject: Social Studies
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