I found out how all this detailed information was obtained some years back.
The battlefield was swept by a grass fire and a member of the fire crew told me that the cases and other items were all exposed after the heavy grass was burnt away to bare ground.
The Archaeologists then walked the battlefield collecting the items and their detailed location.
Firefighter told me that there was a lot of stuff!
“The battlefield was swept by a grass fire and a member of the fire crew told me that the cases and other items were all exposed after the heavy grass was burnt away to bare ground.”
National Geographic had a great article on that near the time of the fire. Back before they went full-on commie scum.