Death to yankees edition
An example of the South's penchant for dressing in their Sunday best was a complete lack of dress uniform. This was not because of a lack of want for dress, but rather because the commissioned officers elected rather to always dress in their best. This served multiple purposes, as it made officers and their ranks easier to spot while combining this with style.
The Austrian knots on their sleeves correspond with their ranks in an aesthetically pleasing and elegant way, and the colors of the uniform's trim told of their branch (Artillery, Infantry, Cavalry, Militia being red, blue, yellow, and black, respectively).
The sole differences for proper dress scenario are minor, such as the wearing of white gloves (this was also worn during sentry duty among others), as the officers preferred to look as daring on the battlefield as they do in ball and parade.