character: Bulgarian Army
topic: Military Actions on the Eastern Front during WWI
grade: 8
subject: History
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character: Serbian Army
topic: Conflicts with Bulgarian Forces on the Eastern Front
grade: 8
subject: History
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character: Ottoman Empire
topic: Allied Forces Against the Bulgarian Army in WWI
grade: 8
subject: History
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character: Romanian Army
topic: Engagements with Bulgaria during the Eastern Front Campaigns
grade: 8
subject: History
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