Question

explain Balkan issue
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Answer 1

Serbia, Greece and Bulgaria were under Turkey which was called the Ottoman Emperor.These states wanted independence because of despotic rule of Turkey due to the right of nationalism.Islams made the Christians their victims. So, there was frequent war to the Balkan region.

The war set the stage for the Balkan crisis of 1914 and thus served as a "prelude to the First World War". By the early 20th century, Bulgaria, Greece, Montenegro and Serbia had achieved independence from the Ottoman Empire, but large elements of their ethnic populations remained under Ottoman rule.

the countries in the Balkan Peninsula: Croatia, Bosnia and Herzegovina, Slovenia, Serbia, Montenegro, Kosovo, Macedonia, Romania, Bulgaria, Albania, Greece, and the European part of Turkey.