Screen shot from the video.
I need to make the colored unit symbols more visible. I think some arrows to show the movement would help.
The map is labeled with "FORREST" but I should also include "CHALMERS" to give him some credit.
Matt Atkinson who is the speaker is an Ole Miss graduate. I have attended a few tours that he led at Gettysburg. Myself being an Auburn University and University of Alabama graduate had some interesting discussions regarding SEC football.