You would think Ridley Scott(Gladiator) and the History Channel would get it right. I just viewed the promo for their special program premiering on Memorial Day, Gettysburg and was shocked that they were using the Confederate Army of Tennessee battle flag in some of the re-enactments. A flag that didn't exist until over a year after the battle! It looks like a cheap printed flag at that. Check it out:
http://www.history.com/shows/gettysburg/videos/sneak-peek-gettysburg#sneak-peek-gettysburg