Ghana, Mali, and Songhai were all trading powers that ruled over large areas. Historians often refer to them as empires, as well as kingdoms. The rulers of some trading cities in West Africa became wealthy by collecting taxes from the goods that were bought and sold.
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That it’s run by a king or queen
The Coal Strike of 1902 or the Anthracite Coal Strike was a strike by the United Mine Workers of America in the anthracite coal fields of Eastern Pennsylvania. The strike threatened to shut down winter fuel supplies for the surrounding areas which led to Roosevelt getting involved. He helped to set up a commission to investigate the strike and the conditions that the workers were striking for which helped to end the strike. The strike ended and never commenced again and the laborers were paid higher wages for less hours.