The kings of the 7th and 8th Dynasties , who represented the successors of the 6th Dynasty , tried to hold onto some power in Memphis but owed much of it to powerful nomarchs. After 20 to 45 years , they were overthrown by a new line of pharaohs based in ہیراکلیوپولس میگنا . Some time after these events , a rival line based at طیبہ ، مصر revolted against their nominal Northern overlords and united بالائی مصر . Around 2055 BC , Mentuhotep II , the son and successor of pharaoh Intef III defeated the Herakleopolitan pharaohs and reunited the Two Lands , thereby starting the Middle Kingdom.
Entity: بالائی مصر — Type: /location