Thank you both. I fell asleep while watching Gettysburg, woke up with a question I never even pondered. One never knows when it happens but it sure can make you wonder.
Since you brought up "Gettysburg" .... the Park Service ( we filmed a good deal on NPS actual battlefield) required a 10 minute rule
on Artillery between firing and reloading... " back to one " is the term
Meaning, re-set for another take (camera roll or take )
Two things made this note worthy...
* The Reenactor's prided themselves in " getting back to one " ( the exact position for another take )
as historians and trained units... Infantry , Artillery and Horsemen , wagons etc.
They would re-set well before , production/Camera could be ready to roll.
Camera never waited , it amazed the production crew early on and became quite remarkable.
* the Artillery, were required to wait 10 minutes before they to touch the gun after firing, this was strictly adhered to.
Often camera/production and more so the reenactors had to wait as the clock ticked down the full 10 minutes before
the Artillery crews could even begin to "get back to one "
The late Skip Cosper, first assistant director refereed to reenactors as " Background Artist's "
and production coined them "Cosper's Corp"
I was an Assistant Director corps background wrangler under Skip , directing the horsemen.