This fascinating 1862 map by Justus Perthes and Stieler depicts the United States, Mexico and the West Indies.  Made at the height of the Civil War, this map separates the Union and Confederate States.  The Union is Blue – as is the whole.  The Confederate states are pink. Undeclared states and territories are depicted in Yellow.  In cartographic flourish unique to Perthes, land profiles decorate the bottom of the map. All text is in German. Unlike other cartographic publishers of the period, the Justus Perthes firm, did not transition to lithographic printing techniques.  Instead, all of his maps are copper plate engravings and hence offer a level of character and depth of detail that was impossible to find in lithography or wax-process engraving. Issued in the 1862 edition of Stieler’s Schul-Atlas.
<bdi><a href="https://en.wikipedia.org/wiki/en:Justus_Perthes" class="extiw" title="w:en:Justus Perthes"><span title="German publisher (1749-1816)">Justus Perthes</span></a>
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1862<div style="display: none;">date QS:P571,+1862-00-00T00:00:00Z/9</div>
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