The Ghana Empire was the first major African empire located along the trans-Saharan trade route, controlling the lucrative salt and gold trade. Its wealth allowed expansion until conquered by the Mali Empire in the 1200s seeking to control the trade routes. The Mali Empire grew further under Mansa Musa but internal conflicts weakened it, allowing the Songhai Empire to rise led by the great ruler Askia. However, European arrival with guns upset the balance of power, eventually colonizing Africa. The empires demonstrate how large nations struggle with control, forcing non-powers to innovate while powers resist change, all contributing to the rise and fall of African empires over time.