I just watched this genealogy Webinar (free through Jan 26th) called, "Death and Burial Practices in World War I and WW II."

It is very interesting and has so much history it is worth over an hour of your time. It even shows how to find maps of locations where some WWI soldiers died and were initially buried on the battlefield, as well as detailing the battle they died in. It includes some history of their mothers visiting the graves in 1930. Also, it goes into some details of the 1985 Gander Air Crash and recovery and identification of soldiers remains.

https://familytreewebinars.com/download.php?webinar_id=1585

The syllabus is available here:
https://familytreewebinars.com/pdfs/webinar-free1611100398.pdf

I didn't know this information existed.

I'll check it out tomorrow.

Thanks OP