That's the one with the Union on one side of the river in the heavy dense woods right? if so it's hard although people have plenty of strategies to beat it, i personally rush 4 brigades around the right side of the map and hit the Union in the flank. Other ways of doing it is to assault from the left and have your arty push up with your infantry so as they use canister to obliterate any union forces.
oh and a general reminder, if anyone not just you, but anyone needs help the forums are a great place to check, as well as the steam guides.
Forum:
http://forum.game-labs.net/index.php...al-discussion/