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1. en.wikipedia.org › wiki › Underground_RailroadUnderground Railroad - Wikipedia

   en.wikipedia.org › wiki › Underground_Railroad

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   6 ore fa · t. e. The Underground Railroad was a network of secret routes and safe houses established in the United States during the early to mid-19th century. It was used by enslaved African Americans primarily to escape into free states and from there to Canada. [1] The network, primarily the work of free African Americans (and some whites as well), [2 ...

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