I actually did do something similar to this (inspired initially by @scribblemhorror.bsky.social's Mapping Game, which took inspiration from Verdun!)
It was for a stand-alone dungeon crawler game that I was working on called ODD DELVES - I should return to that someday, haha.
Chaoclypse (Brandon Yu)
Seriously considering using the assault combat matrix in Marc Miller’s Verdun to resolve OD&D melee.
It’s simple, it’s clear, it’s terrifying.