viewtopic.php?f=95&t=174&start=100
I'll copy Radoye great post:
Radoye wrote: ↑2021-03-13 03:22, Saturday It would be a herculean task to rework the entire PG/AG SSI map catalogue to a consistent single scale. PacGen had a scale modifier value in scenarios which would change firing ranges (so that Iwo Jima and Central China make more sense within the same campaign, especially with appropriate turns per day / days per turn settings), unfortunately we don't have that in PG/AG/PGF, and if we try to stick to a consistent scale Sevastopol would be just a single hex on a map rather than a whole scenario map. Every single map would have to be redone from scratch. So IMO that ship has sailed a long time ago.
Trying to model single units as divisions - in fact, anything larger than a battalion - these would have to include everything at once (except planes and ships), infantrymen, artillery, cavalry (where applicable), tanks, armored cars, bridging equipment, your uncle and my grandma... And there's no good way to model this under PG rules as a single unit, you can't give it the capabilities of infantry and tanks and artillery all at once, unfortunately it doesn't work that way.
So HexCode is right in that the game rules favor smaller unit modeling where an infantry unit is chiefly made up by infantrymen, tank unit by tanks/armored vehicles, artillery by artillery pieces etc. Once you go above the battalion scale this breaks down and no longer can suit the purpose. But if you go below battalion scale, you're no longer talking kilometers for a hex size but meters (and we arrive at Steel Panthers territory), so larger scale PG maps no longer make any sense and if we reduce the scale to company level you're no longer invading a country but at best maybe a railway junction or a river crossing. I mean, that's perfectly fine too for those who like it like that, let there be a 1000 blossoms bloom i always say, but then we're no longer talking about Operation Barbarossa or Normandy landings or some such - which will not sit well with others who like it that way.
So, since the map scales are already widely inconsistent, IMHO as the best compromise (and you're free to disagree with me), battalion scale for unit modeling is a perfect fit because it's the largest organizational unit that is still made up largely of the same type of troops - with some added support elements that we can calculate into the stats - infantry is still (mostly) infantry, tanks units are tank units etc. This is also considered as the smallest military unit capable of independent operations on the other hand. It works (somewhat) in a Sevastopol / Washington scenario type, it works (somewhat) in a Moscow / Stalingrad scenario type and everything in between, so there you have it.