The societies and towns on the upper Nile River, or Upper Egypt began to join together. This was also happening in the Nile Delta, or Lower Egypt. There were often wars between Upper and Lower Egypt. During his rule in Upper Egypt, King Narmer defeated his enemies on the Delta. He joined the Kingdom of Upper and Lower Egypt together under his rule. Narmer is shown in pictures wearing the double crown, called the Pschent, with the lotus flower of Upper Egypt and the papyrus reed of Lower Egypt. These symbols of a united Egypt were used by all future rulers. In mythology, the falcon-god, Horus of Lower Egypt, won a battle over the god Seth, of Upper Egypt. This helped start the idea that Egyptian kings were gods and divine, which lasted for 3,000 years. It was the basis of Egypt's government. The unification of societies of the Nile has also been linked to the drying of the Sahara.