This tribe migrated across Africa, bringing iron technology with it.

Bantu

Nok

Kush

Zulu

Bantu

Explanation:

The Bantu people migrated across Africa in a process known as the Bantu expansion. This refers to a series of migrations in which the Bantu people displaced or absorbed hunter-gatherers and pastoralist groups that they encountered. The Bantu people carried their language with them, as well as some technological and cultural traits, such as iron technology. However, little is known about the details of this expansion.

Bantu, The bantu tribe migrated across Africa bringing iron with theim in arround 3000 BC.