"IF" I remember correctly, that print is called the "Attack of the Louisiana Tigers" and they assaulted East Cemetery Hill. For sure the 8th Louisiana carried a battle flag into the frey. I would expect the other units did too. I am not sure of the date of the print, but it may have been when the 2nd National was more in vogue. The 2nd National was adopted on May 1. The ANV was on the move for the Gettysburg Campaign at the end of May or early June, so not sure if the units could be issued the 2nd National in a timely manner.
JIM T