The two main reasons why Douglas opposed John Brown's plan to raid Harper's Ferry were that he was sure the plan would fall and lead to many black deaths, and he thought he would hurt the abolition movement by causing a backlash.
Rome,italy was connected to chang'an
Potelmy’s map was based on information by merchants and soldiers who travelled through the Roman Empire. The Ptolemy map is known to Hellenistic society in the 2nd century. Waldseemuller map used information from explorers as well as producing the first map with the label “America”. It was the primary guide, printed or original copy, to delineate clearly a separate Western Hemisphere, with the Pacific as a separate ocean.
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The scientists who invented the V2 rocket and V1 flying bomb were used by NASA to build the rockets that sent us to the moon. To think that the greatest achievement of mankind was also built on the shoulders of its greatest atrocities. They also helped to create Intercontinental Ballistic Missiles, and a new age of Nuclear warfare.