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On chugging g Ruddock NM biatch VB tricksy CI VGB rustic
Copan had a population of at least 20,000 . Hope it helps
I believe the answer is Barbed Wire.
Befor the inventions of barbed wire, the Cattles are let to roam freely across the plains and the owners are required to pay a lot of cowboys to supervise them so they didn't go missing. Witht he invention of barbed wire, they can keep the cattle in a secure place without supervision.
