The Kushites and the Egyptians had been defeated by a superior technology. While they were fighting with weapons made of copper and bronze, the Assyrians fought with iron. Methods of smelting and working iron had been developed centuries before by the Hittites who lived in Asia Minor. The use of iron spread across the Near East, becoming the basis for the Assyrian power. After their defeat in 666 B.C., the Kushites and the Egyptians rapidly adopted the new iron technology. The coming of the Iron Age to Africa meant the production of better weapons and tools. Better weapons provided safety from hostile foes and protection from ferocious beasts. Better axes meant that man could live in densely forested regions where he had not been able to live before. Better farm implements meant that more food could be grown with less work, this again encouraged the development of denser population centers. By 300 B.C., Kush had become an important iron-producing center. Its capital, Meroe located on the upper Nile, developed into a thriving commercial and industrial city. Archeological diggings have unearthed the remains of streets, houses, sprawling palaces, and huge piles of slag left from its iron industry. When scholars are able to decipher the Kushitic writings much more will be known about the culture and way of life of this early black empire. In the first century A.D. a Kushite official, whom the Bible refers to as the Ethiopian eunuch, was converted to Christianity by the apostle Philip while returning from a visit to Jerusalem. Shortly, Christianity spread throughout the entire kingdom. When Kush was defeated by the Axumites, founders of modern Ethiopia, several smaller Nubian, Christian kingdoms survived. Not until the sixteenth century, after almost a thousand years of pressure, did Islam gain supremacy in western Sudan. Ethiopia, shortly after defeating Kush, also became Christianized, and survived as a African only Christian island in a Moslem sea. In fact, Ethiopia has remained an independent, self-governing state until the present, with the brief exception of the Italian occupation between 1936 and 1941.