The Balkans were called the "Powder Keg of Europe" because three large empires wanted control of the region.
The Balkans, also known as the Balkan Peninsula, is a geographic area in southeastern Europe with various geographical and historical definitions.
They are usually characterized as comprising Albania, Bosnia and Herzegovina, Bulgaria, Croatia, Kosovo, Montenegro, North Macedonia, Romania, Serbia, and Slovenia—with all or part of each of those countries located within the peninsula.
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