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  He proposed to congress that the U.S. should build a railroad that spanned from the Mississippi to the Pacific.
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  Oregon is defined as a territory
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  Mexican territories are conquered by the U.S.
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  Gold is Discovered in California
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  Congress got funds to survey the land that was to be built on
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  Senator Stephen Douglas introduced the Kansa Nebraska Act which was introduced so that he may get a railroad line from Chicago
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  The republican Controlled congress approved of the construction of a trans contential railroad
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  The UPR began to build the railroad starting at Omaha, Nebraska
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  Opposite rails meet in Promontory Summit, Utah. A golden spike is placed last to finish the railroad
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  Kansas to Los Angeles, Los Angeles to New Orleans ;all finished
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  The Great Northern Railroad Finished