a-world-at-war:

The spear is one of the oldest man made weapons. It started to be used in battles during the Old and Middle Kingdom of Egypt’s Dynastic period. The spear had a typical pointed blade that was attached to a long wooden shaft by a tang. The pointed blade, in those days was made of copper or flint. Later, the new kingdom made these spear in bronze and improved its make. Many of these spears were used in the form of javelins. But bow and arrow were more popular than spears in Egypt. Spears, nevertheless were kept as a backup, as an auxiliary weapon of the charioteers, who would be out of arrows.

Source: http://en.wikipedia.org/wiki/History_of_Weapons