It might not be PC here. It might be simple ignorance of the flag facts for the Confederates in the Vicksburg Campaign. I sent them a long post on their Facebook page this afternoon correcting their view and stating by unit, known ANV style flags used in the campaign. I also mentioned the other flag patterns used in the campaign to give them a big view of this topic. Posts go to their moderator first so let's see what they do. Check their Facebook page.