I completed my first campaign since making the switch to the old style challenge rating. This was Ace KTO Iron Fortress. Other campaigns would see a much more marked swing in force ratio. So I picked the softest one first

Tiger Spirit or Rolling Fire would see a bigger shift in strength and I'll give one of those a go next.

The boost in Red strength was apparent, as they weren't broken by the time it ended. And the ground forces ratio could have been a factor as well. Blue battalions are brittle on Ace. In the end it didn't have much effect on the result, but kept things interesting with a more active airspace. The quick end meant I didn't see it play out for long. KTO IF is the easiest campaign I think, as in only requires Blue to open the corridor through Osan and Suwon to take Seoul. That's what I did here and just held in the central and the east. Blue troops captured Seoul at 1800 hours, Day 2.