So these people were forced at times to the mountain valleys and the grasslands of the north, and as far as the agricultural lands in the river valleys, hovering around the settled districts for food supplies for themselves and their herds. After {161} the early settlement of Sumer and Akkad, these Semitic tribes moved into the valley of the Euphrates, and under Sargon I conquered ancient Babylonia at Akkad and afterward extended the conquest south over Sumer. They found two main cities to the west of the Euphrates, Ur and Eridu. Having invaded this territory, they adopted the arts and industries already established, but brought in the dominant power and language of the conquerors. Four successive invasions of these people into this territory eventually changed the whole life into Semitic civilization. Later a branch moved north and settled higher up on the Tigris, founding the city of Nineveh. The Elamites, another Semitic tribe on the east of the Euphrates, founded the great cities of Susa and Ecbatana. Far to the northwest were the Armenian group of Semites, and directly east on the shores of the Mediterranean were the Phoenicians. This whole territory eventually became Semitic in type of civilization. Also, the Hixos, or shepherd kings, invaded Egypt and dominated that territory for two hundred years. Later the Phoenicians became the great sea-going people of the world and extended their colonies along the coasts through Greece, Italy, northern Africa, and Spain. So there was the Semitic influence from the Pillars of Hercules far east to the River Indus, in India. Strange to say, the mighty empires of Babylon and Nineveh and Phoenicia and Elam failed, while a little territory including the valley of the Jordan, called Palestine, containing a small and insignificant branch of the Semitic race, called Hebrews, developed a literature, language, and religion which exercised a most powerful influence in all civilizations even to the present time.