It’s been awhile but I still remember the part when recruiters were telling underage teenagers they needed to “step outside and have a few birthdays first”. As in, ‘come back and tell me the right age’.

Also, the part where one vet talks about taking prisoners, and how machine-gunners were not taken prisoner.

I knew that Tolkien had served in WWI, but this is the documentary that laid bare the origins of many aspects of Middle-Earth.

https://en.wikipedia.org/wiki/The_Great_War_and_Middle-earth