character: Serbia
topic: Expansion and Influence in the Balkans
grade: 6
subject: History
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character: Ottoman Empire
topic: Its Role in the Balkans
grade: 6
subject: History
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character: Austria-Hungary
topic: Rivalry with Serbia in the Balkans
grade: 6
subject: History
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character: Balkan States
topic: Formation and Nationalism
grade: 6
subject: History
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