[Imp]

You have more resolve than me I gave it a couple of shots before giving up.
Long time ago so cannot really remember but the main problem is getting flank shots on the Centurions as they need to be dealt with.
Causes time problems but try using the railroad & smoke to limit engagements, you have a lot offboard arty & tanks to plug gaps.
Really needs micro managing to get smoke clearing right, beware of the infantry they can really mess things up if you try to close which is when I threw in the towel as it was frying my brain.

Gamey way possibly attack with virtually everything in the bottom half of the map then let them come to you.
Good luck if you try again.