Nubia was an ancient civilization located along the Nile River in present-day Sudan. For over 2000 years, from around 2000 BC to 350 AD, Nubia established itself as a powerful kingdom known as Kush. The Nubians traded extensively with Egypt and other civilizations. At its height between 700-300 BC, Nubia's Meroitic kingdom entered a Golden Age as a flourishing, iron-working civilization that traded with Asia and conquered neighboring regions. However, the kingdom eventually declined due to overfarming depleting the soil and cutting down too many trees used for iron production and charcoal.