According to legends, there was a single King who unified Egypt in the 3 Millenium BCE and his name was Menes.
Menes is thought to be the first King to unify ancient Egypt. He ruled in Upper Egypt but was able to conquer Lower Egypt and join it to his kingdom.
Due to inconclusive information on his reign, his stories end in legend with no concrete proof that he existed.
Find out more on King Menes at https://brainly.com/question/11946513.
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