[Portrait of Pvt. Robert Patterson, Company D, 12th Tennessee Infantry, C.S.A.]
There are not many details distinguishing the Confederates from the Union soldiers in many of portrait photographs - they really were from the same country, the same culture. One of the differences that you do find is the less uniform appearance of Confederates: they are much less standard, often wearing bits and pieces of cast-off Union Army uniforms and often, even weaponry. One thing that’s specific to the Confederates is huge Bowie knives, humorously called ‘Arkansas toothpicks,’ often made by local blacksmiths.