The Balkans was a region of ethnic and geographical diversity comprising modern-day Romania, Bulgaria, Serbia, Greece, and others, largely under the Ottoman Empire. The spread of romantic nationalism and the disintegration of the Ottoman Empire made it explosive. Balkan peoples used history to claim lost independence, leading to fierce rivalry among Slavic nationalities. Additionally, major European powers — Russia, Germany, England, and Austro-Hungary — competed for control over the region, turning local nationalist conflicts into broader power struggles that eventually triggered the First World War.
Source: Chapter 1 – Nationalism in Europe, Section 6: Nationalism and Imperialism
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