CTP(2) doesn't use a separate screen. Thats merely a way to display the battle progress and outcome. You can turn it off, and battles are negotiated exactly the same way, on the main map, just without a progressive display.
As for including directional entrenching.
K.I.S.S.
As for including directional entrenching.
K.I.S.S.
So this diagonal one allow us to go into D and B and flank there too, so they should also be covered by either artillery or more units, like this:
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