character: Bulgaria
topic: Alliances during World War I
grade: 6
subject: History
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character: Triple Alliance
topic: Countries involved in the Triple Alliance during World War I
grade: 6
subject: History
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character: Central Powers
topic: Bulgaria's role in the Central Powers during WWI
grade: 6
subject: History
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character: Entente Powers
topic: Bulgaria's opposition to the Entente Powers
grade: 6
subject: History
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