The combined Union Pacific-Central Pacific line became known as the First Transcontinental Railroad and later the Overland Route. The line was constructed primarily by Irish labor who had learned their craft during the recent Civil War.
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John brown was killed because he fought to eliminate slavery all together. Because of this he is labeled as a martyr for being executed for his beliefs. But he was actually executed for murder of slavery owners and for breaking in to the federal arsenal in harpers ferry to start a revolution.
About 100 miles got my answer from answer.com
<span>While many believed that Native Americans were truly their greatest threat, in reality, it was the simple and mundane things like disease and accidents that did the most damage to the travelers. The fact that they traveled so closely together (and without the help of proper modern medicine) it was easier to get sick and without the ability to heal, eventually die from simple diseases such as the common cold. Other ways pioneers could be injured is by buggy turnovers on the steeper areas of hills and mountains which had more of a rocky flooring.</span>
