Secretary of War Jefferson Davis ordered the creation of a map of the U.S. territory from the Mississippi River to the Pacific Ocean, which Gouverneur Kemble Warren delivered while he accompanied railroad route explorations in the 1850s. The cartographer found more fame in the Civil War, and he is shown above (fifth from left, in front of the flag) with his Union troops at the 5th Army Corps headquarters in 1864. – Courtesy Heritag


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