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By the mid 1400s ,Europe began to reachout beyond its boundries in a great age of discovery and exploration.
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In1488, Bartholomeu Dias reached the cape of good hope at the southeren tip of Africia. 10 years later ,Vasco da Gama sailed around it to India.
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In 1492,they sent a Italian navigator Christopher Clombus ,with three small ships the Nina , the Pinta , and the Santa Maria westward across the Alantic.
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In the 1770s, the american colonies, beginning with the thirteen british coloniesin North America, revolted aganist British control.
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In their place , traders eventually transported more than 20 million Africans to the Americas as enslaved persons, untill the slave trade was outlawed in the early 1800s.