They rode fleet horses and they used bows and arrows. Within a short time they had made themselves master of the entire country. For five centuries they ruled the land of Egypt. They removed the old capital to the Delta of the Nile. They oppressed the Egyptian peasants. They treated the men cruelly and they killed the children and they were rude to the ancient gods. They did not like to live in the cities but stayed with their flocks in the open fields and therefore they were called the Hyksos, which means the Shepherd Kings. At last their rule grew unbearable. A noble family from the city of Thebes placed itself at the head of a national revolution against the foreign usurpers. It was a desperate fight but the Egyptians won. The Hyksos were driven out of the country, and they went back to the desert whence they had come. The experience had been a warning to the Egyptian people. Their five hundred years of foreign slavery had been a terrible experience. Such a thing must never happen again. The frontier of the fatherland must be made so strong that no one dare to attack the holy soil. A new Theban king, called Tethmosis, invaded Asia and never stopped until he reached the plains of Mesopotamia. He watered his oxen in the river Euphrates, and Babylon and Nineveh trembled at the mention of his name. Wherever he went, he built strong fortresses, which were connected by excellent roads. Tethmosis, having built a barrier against future invasions, went home and died. But his daughter, Hatshepsut, continued his good work. She rebuilt the temples which the Hyksos had destroyed and she founded a strong state in which soldiers and merchants worked together for a common purpose and which was called the New Empire, and lasted from 1600 to 1300 B.C. Military nations, however, never last very long. The larger the empire, the more men are needed for its defense and the more men there are in the army, the fewer can stay at home to work the farms and attend to the demands of trade. Within a few years, the Egyptian state had become top-heavy and the army, which was meant to be a bulwark against foreign invasion, dragged the country into ruin from sheer lack of both men and money. Without interruption, wild people from Asia were attacking those strong walls behind which Egypt was hoarding the riches of the entire civilized world. At first the Egyptian garrisons could hold their own. One day, however, in distant Mesopotamia, there arose a new military empire which was called Assyria. It cared for neither art nor science, but it could fight. The Assyrians marched against the Egyptians and defeated them in battle. For more than twenty years they ruled the land of the Nile. To Egypt this meant the beginning of the end. A few times, for short periods, the people managed to regain their independence. But they were an old race, and they were worn out by centuries of hard work.