Nubia benefited from the disintegration of the New Egypt kingdom to become Kush
Nubia was once a tributary of Egypt and was the most important lifeline of the kingdom serving as the source of gold and leopard skin. However, around 2000 b.c.e the disintegration of the vast empire that trans versed two continents,benefited Kush to the extent that Egypt itself also became a tributary of Kush.