Ghana, according to my son's test
The kingdom of Ghana
The answer is Ghana
Complicit.
The first West African kingdom based on wealth from trade was the Ghana Empire. Flourishing between the 6th and 13th centuries, it became a powerful state due to its control over trans-Saharan trade routes, particularly in gold and salt. The empire's prosperity attracted traders and influenced the development of subsequent kingdoms in the region, such as Mali and Songhai.
The spanish
To obtain goods and firearms from Europe
West African societies benefitted from trade because they would get useful items for their family and other important needs to support them.
The kingdom of Aksum was the first kingdom to extend control over trade. They did this by making their own currency and establishing hegemony over the Kingdom of Kush. They also participated in politics of the other kingdoms in the Arab nations.
Songhai
Northern Africa continued to develop through trade with the Islamic centers of the Middle East
Ghana's ruler imposed taxes on all the gold and salt passing through his kingdom.