"Soon after Athens had reached the height of its glory under Pericles in the Fifth Century, B. C., and had started on its decline, the rise of Macedon under Philip carried Greek influence into new regions. The glory of Athens had been based upon sea power, but the conquests of Macedon were the work of land armies— Philip invented the invincible phalanx. Upon Philip's death his son, Alexander the Great, set forth to conquer the whole of the then known world, and as that world in his day lay to the east, his marches were in that direction. In a few years he had overrun the fertile plains and opulent cities of Asia Minor, Syria, Mesopotamia, and Persia, and had carried his conquests to the gates of Delhi. In all the cities in the intervening countries he left large garrisons of Greek soldiers. In many of these countries he founded flourishing new cities. In every place his soldiers were followed by large colonies of Greek civilians. The result was that the whole of western Asia, and of what we call the Near East, including Asia Minor Egypt, Palestine, Syria, Babylonia, Mesopotamia, Persia, and northwestern India, was saturated with the Greek influence and with Greek colonies."