As the title says. Sounds like a very Arneson thing to do...

I used to, back in high school. That group of gamers started as wargamers and miniatures gamers before we found OD&D, so it was natural to adventure until a war broke out and then move to a large space where we could fight the battles.

My current group isn't interested in wargames, so no.

Quite a few years ago, when D&D published the Battlesystem (if I remember its name right), we picked it up immediately and we often, if not always, managed to add armies in our adventures and campaigns.
After that, I didn't do much, honestly.