I think I’ve seen this before, and it is, as you say, fascinating.
It’s been around a few months, but I hadn’t seen it until now. If I was posted here before, it didn’t come up in my search, but that’s not always reliable.
I’m a history teacher - it’s changed what my students will be doing today (it’s the very end of the school year here anyway - so I can slot it in everywhere, even if it doesn’t quite fit). The boys I teach will be absolutely delighted with anything soldiery.