Geography of Europe is not surrounded by sea and its southeastern border has always been variously defined for centuries. In terms of shape, Europe is a collection of connected peninsulas and nearby islands. The two largest peninsulas are mainland Europe and Scandinavia to the north, divided from each other by the Baltic Sea. Three smaller peninsulas—Iberia, Italy and the Balkans—emerge from the southern margin of the mainland. The Balkan peninsula is separated from Asia by the Black and Aegean Seas. Italy is separated from the Balkans by the Adriatic Sea, and from Iberia by the Mediterranean Sea, which also separates Europe from Africa.
Western imperialism in Asia victory enabled Portugal to implement its strategy of controlling the Indian Ocean. Early in the 16th century Afonso de Albuquerque (left) emerged as the Portuguese colonial viceroy most instrumental in consolidating Portugal's holdings in Africa and in Asia. He understood that Portugal could wrest commercial supremacy from the Arabs only by force, and therefore devised a plan to establish forts at strategic sites which would dominate the trade routes and also protect Portuguese interests on land. In 1510, he conquered Goa in India, which enabled him to gradually consolidate control of most of the commercial traffic between Europe and Asia,