The beginning of the iron age scholars refer to the I Millennium BC. The appearance of iron, which replaced the bronze, has had an enormous influence on the development of the lifestyle of people. Iron was cheaper than bronze. Many people began to specialize in metal smelting. Have created the first state, to protect which required the armed soldiers. The Celtic tribes which were located on the territory of modern France, Belgium and Italy, were able not only to melt the metal, but also make him a great weapon. The melting furnace was available even in the smallest of Celtic settlements.