The ancient Egyptians conquered the Nubian territory several times.
Nubia also conquered Ancient Egypt during the 25th dynasty. They had a very complex relationship with both friendly exchanges and some not so friendly.
Nubians and Ancient Egyptians are not the one and the same.
The ancient Egyptians describe the Nubians as darker than them.
It depends on the nubian group. The ancient egyptians made a distinction between the varies nubian ethnicity. Also, the ancient egypt never used the word nubian. The word nubian basically means gold. It was a place where the egypt extracted their gold from a particular nubian group. The Egypt went by their Kingdoms and tribal names, for example medjay, Wawat, Kush, Kerma, Irejet, Yam, Setjau and ta seti. Some nubians (example ta seti was the first nome in upper egypt, but the inhabitants were predominately nubians) were part of Egypt others group were not. In fact, according to many scholars the pharaohs of the 12th dynasty started by Amenemhet were nubians as well.
The prophecy of Neferti:
Then a king will come from the South,
Ameny, the justified, my name,
Son of a woman of
Ta-Seti, child of Upper Egypt,
He will take the white crown,
he willjoin the Two Mighty Ones (the two crowns
http://www.touregypt.net/featurestories/amenemhet1.htm
Various pharaohs of
Nubian origin are held by some Egyptologists to have played an important part towards the area in different eras of Egyptian history, particularly the
12th Dynasty. These rulers handled matters in typical Egyptian fashion, reflecting the close cultural influences between the two regions.
...the XIIth Dynasty (1991–1786 B.C.E.) originated from the Aswan region. As expected, strong Nubian features and dark coloring are seen in their sculpture and relief work. This dynasty ranks as among the greatest, whose fame far outlived its actual tenure on the throne. Especially interesting, it was a member of this dynasty that decreed that no Nehsy (riverine Nubian of the principality of Kush), except such as came for trade or diplomatic reasons, should pass by the Egyptian fortress and cops at the southern end of the Second Nile Cataract.
Why would this royal family of Nubian ancestry ban other Nubians from coming into Egyptian territory? Because the Egyptian rulers of Nubian ancestry had become Egyptians culturally; as pharaohs, they exhibited typical Egyptian attitudes and adopted typical Egyptian policies. (Yurco 1989