How did Ghana expands its kingdom

The Ghana Empire grew rich from this increased trans-Saharan trade in gold and salt, allowing for larger urban centres to develop. ... When, in 1957, the Gold Coast became the first country in sub-Saharan Africa to gain its independence from colonial rule, it renamed itself Ghana in honor of the long-gone empire.

Explanation:

julius caesar turned the roman republic into the roman empire by coming in and taking the "dictator" role during the time of a civil war (elites vs lower classes) winning battles and reputation, then declaring him dictator for life

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