Try lose there power by
salt and precious minerals
the byzantine empire rose to the power as the empire of Ghana crumbled
The Kingdom of Ghana became powerful by taxing gold merchants who passed through its lands. In contrast, the Umayyad Empire extended its power through campaigns of conquest by Islamic armies.
Ghana expanded its kingdom by offering protection to the smaller tribes then he would control there tribe and expand there kingdom.
Ghana fell and became part of the kingdom of Mali
Empire of Ghana which is known as Ghana Empireto find more interesting facts searchAncient Ghana - BBCwww.bbc.co.uk/worldservice/africa/features/.../4chapter1.shtml
How have historians learned about the kingdom of Ghana
The nation of Ghana in Africa was named for the ancient Ghana Empire, or Kingdom. In the language used in that ancient kingdom, 'ghana' meant, "Warrior King", a name, no doubt, meant to frighten their enemies.
Gold
Mali
Gold!
Ghana got its independence from the United Kingdom in 1957.