Final answer:
Narmer, a king of Upper Egypt, united Egypt in roughly 3100 BCE. Some records attribute this achievement to a king called Menes. Egypt remained united until the end of the Bronze Age around 1100 BCE.
Step-by-step explanation:
In roughly 3100 BCE, Narmer, a king of Upper Egypt, conquered Lower Egypt and united the country for the first time. Some records attribute this achievement to a king called Menes, but many scholars believe Menes and Narmer are one and the same. This political and cultural shift led to the formation of a powerful kingdom that remained united until the end of the Bronze Age around 1100 BCE.