Great fertility in a narrow coastal belt barred from the interior serves to concentrate and energize the maritime activities of the nation. The 20-mile wide plain stretching along the foot of the Lebanon range from Antioch to Cape Carmel is even now the garden of Syria.[472] In ancient Phoenician days its abundant crops and vines supported luxuriant cities and a teeming population, which sailed and traded and colonized to the Atlantic outskirts of Europe and Africa. Moreover, their maritime ventures had a wide sweep as early as 1100 B. C. Quite similar to the Phoenician littoral and almost duplicating its history, is the Oman seaboard of eastern Arabia. Here again a fertile coastal plain sprinkled with its "hundred villages," edged with a few tolerable harbors, and backed by a high mountain wall with an expanse of desert beyond, produced a race of bold and skilful navigators,[473] who in the Middle Ages used their location between the Persian Gulf and the Arabian Sea to make themselves the dominant maritime power of the Indian ocean. With them maritime expansion was typically wide in its sweep and rapid in its development. Even before Mohammed's time they had reached India; but under the energizing influences of Islam, by 758 they had established a flourishing trade with China, for which they set up way stations or staple-points in Canton and the Sunda Islands.[474] First as voyagers and merchants, then as colonists, they came, bringing their wares and their religion to these distant shores. Marco Polo, visiting Sumatra in 1260, tells us the coast population was "Saracen," but this was probably more in religion than in blood.[475] Oman ventures, seconded by those of Yemen, reached as far south as east. The trading stations of Madisha and Barawa were established on the Somali coast of East Africa in 908, and Kilwa 750 miles further south in 925. In the seventeenth century the Oman Arabs dislodged the intruding Portuguese from all this coast belt down to the present northern boundary of Portuguese East Africa. Even so late as 1850 their capital, Mascat, sent out fine merchantmen that did an extensive carrying trade, and might be seen loading in the ports of British India, in Singapore, Java, and Mauritius. [Sidenote: Soil of coastlands as factor.]