UnknownUnknown
This works just fine, both the native version and running under Proton.
The game's Proton version did occassionally crash. It wasn't a huge deal but it did happen a few times. I did not have this problem when running the game under Proton.
You can basically choose between either version of the game in my experience. Overall, I do think you might have a more stable version on Proton, but I recommend you play both version to get a feel for which one works best for you. Either way, I think you'll find that one of the versions will end up working out.
You might also just skip this title and jump straight into Ultimate General: Civil War instead.
Changed one back grip button from F to M to make it possible to toggle the topographic map.
No fan noise or performance issues noticed after playing through the whole battle on thr Union side.
