Question -
Answer -
1. It was a region of geographical and ethnic variation comprising modern-day Romania, Bulgaria, Albania, Greece, Macedonia, Croatia, Bosnia-Herzegovina, Slovenia, Serbia and Montenegro who were broadly known as Slavs.
2. A large part was under the control of the Ottoman Empire. Gradually independence was declared from them.
3. The spread of the ideas of romantic nationalism in the Balkans, together with disintegration of the Ottoman Empire made this region very explosive.