Ghana, Mali, and Songhai dominated West Africa around From 300 to 1600 A.D.
Not fully understanding your question but You could look up information on that subjct
A. they became more expensive because they used technology
Farm animals gave the disease to European farmers, and they gave it to the Native Americans.
The Sepoy Mutiny was a rebellion of the Indian population (specifically Indian soldiers: Sepoy means a soldier), and this rebellion was lost by the Indian population and Great Britain suppress it.
In order to prevent new rebellions Great Britain reorganized their rule over India and created the British Raj -direct rule.
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