Friedrich Eisendardt 19 arrived New Orleans from Prussia 1853, with his mother, sister and related families. The others all settled near Florence, Morgan County, Mo. but there's no record of him there in civil or church records.

A Frederick Eisenhart of Co. B, 13th Louisiana Infantry who died 27 April 1862 is buried in Jefferson Barracks National Cemetery: Is there any way to determine his age?

Would burial of a Louisiana veteran at Jefferson Barracks imply a Missouri connection?

I don't find a match for him anywhere any spelling in the 1860 census.