In 500 C.E., the Romans decided to advance further. During 10 years, the Romans had constructed a great, superior navy and an army of a 3 million soldiers In 510 C.E., they had met the Sahara Desert for their first time. The Battle of the Nile was the first war in Africa. The Egyptians were weakened by civil wars that happened in their empire. In 515 C.E.,they arrived in Alexandria. Pharaoh Ptolemy X declared war on him. He had many clever battle plannings, but the Romans attacked on the other side of the army. With the army defeated, Egypt became part of the empire.