For centuries, the Balkan peninsula was ruled by the powerful Ottoman Empire. By the late 1800s, however, the Ottoman Empire was retracting. During this period Greece, Serbia, Montenegro and Bulgaria all gained independence from Ottoman rule
30S 90E = None of the above. It's in the Indian Ocean (They could have meant 30S 90W. That's in the Pacific Ocean, which is on the list but hasn't been used).
