What are the time line of the events of the development of west africans empires

The Ghana Empire or Wagadou Empire (existed before c. 830 until c. 1235) was located in what is now southeastern Mauritania, and Western Mali. Complex societies had existed in the region since about 1500 BCE, and around Ghana's core region since about 300 CE. When Ghana's ruling dynasty began is uncertain, it is first mentioned in documentary sources around 830 CE.