Although ucvrelics.com is correct, the style does happen to be one used during the war. The basic pattern is based on the ca. 1850's British sword for officers of Rifles (light infantry) regiments. These were copied extensively by both English and Solingen smiths for use by other countries. In the British original, where the unknown cypher BdeP is on the guard on yours, there was instead a crowned VR (for Victoria Regina or Queen Victoria) over a light infantry hunting horn. On Civil War examples, this is usually some variant of an eagle or seated Liberty over US; I've even seen a photo of one with a Confederite motif instead!
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