I had a similar idea, using Essex 25mm mediaevals (hey, it was the 80s!). All that heraldry put me off.
Like a lot of multi-player games, either some jammy bugger won in the first 30 minutes or it went on all day…
There was a computer version back in the 90s. That was OK, and reasonably faithful to the boardgame.
"I'm not signing that"