section_path: History/4th millenium BC – 6th century AD/Northeast Africa
section_name: Northeast Africa
paragraph_text: Northeast Africa
  
  From 3500 BC, nomes (ruled by nomarchs) coalesced to form the kingdoms of Lower Egypt and Upper Egypt in northeast Africa. Around 3100 BC Upper Egypt conquered Lower Egypt to unify Egypt under the 1st dynasty, with the process of consolidation and assimilation completed by the time of the 3rd dynasty who formed the Old Kingdom of Egypt in 2686 BC. The Kingdom of Kerma emerged around this time to become the dominant force in Nubia, controlling territory as large as Egypt between the 1st and 4th cataracts of the Nile.
  
  The 4th dynasty oversaw the height of the Old Kingdom, and constructed many great pyramids. Under the 6th dynasty power gradually decentralised to the nomarchs, culminating in the disintegration of the kingdom, exacerbated by drought and famine, thus commencing the First Intermediate Period in 2200 BC. This shattered state would last until 2055 BC when the 11th dynasty, based in Thebes, conquered the others to form the Middle Kingdom of Egypt, with the 12th dynasty expanding into Lower Nubia at the expense of Kerma. In 1700 BC, the Middle Kingdom fractured in two, ushering in the Second Intermediate Period. The Hyksos, a militaristic people from Palestine, invaded and conquered Lower Egypt, while Kerma coordinated invasions deep into Egypt to reach its greatest extent.
  
  In 1550 BC, the 18th dynasty expelled the Hyksos, and established the New Kingdom of Egypt. Using the advanced military technology the Hyksos had brought, the New Kingdom conquered the Levant from the Canaanites, Mittani, Amorites, and Hittites, and extinguished Kerma, incorporating Nubia into the empire, and sending the Egyptian empire into its golden age. Internal struggles, drought, famine, and invasions by a confederation of seafaring peoples contributed to the New Kingdom 's collapse in 1069 BC, commencing the Third Intermediate Period.
  
  Egypt's collapse liberated the more Egyptianised Kingdom of Kush in Nubia, who manoeuvred into power in Upper Egypt and conquered Lower Egypt in 754 BC to form the Kushite Empire. The Kushites ruled for a century and oversaw a revival in pyramid building, until they were driven out of Egypt by the Assyrians in 663 BC in reprisal for their expansion towards the Assyrian Empire. The Assyrians installed a puppet dynasty that later gained independence and once more unified Egypt, until they were conquered by the Achaemenid Empire in 525 BC. Egypt regained independence under the 28th dynasty in 404 BC but they were reconquered by the Achaemenids in 343 BC. The conquest of Achaemenid Egypt by Alexander the Great in 332 BC marked the beginning of Hellenistic rule and the installation of the Macedonian Ptolemaic dynasty in Egypt.
  
  The Ptolemaics lost their holdings outside of Africa to the Seleucids in the Syrian Wars, expanded into Cyrenaica and subjugated Kush in the 3rd century BC. In the 1st century BC, Ptolemaic Egypt became entangled in a Roman civil war, leading to its conquest by the Romans in 30 BC. The Crisis of the Third Century in the Roman Empire freed the Levantine city state of Palmyra, which conquered Egypt; their brief rule ended when they were reconquered by the Romans. In the midst of this, Kush regained independence from Egypt, and they would persist as a major regional power until, having been weakened from internal rebellion amid worsening climatic conditions, invasions by Aksum and the Noba caused their disintegration into Makuria, Alodia, and Nobatia in the 5th century AD. The Romans managed to hold on to Egypt for the rest of the ancient period.