Mutually supporting Corps, formed of Divisions, with mixed arms included, establish or capture a supply depot. They re-organize, and then repeat the procedure. Along the road to Richmond or Washington they will win or lose battles. Because of that plans will have to be altered to take advantage of Victories or fall back from Defeats.
The developers of this amazing Game have given us all the tools to recreate those aspects of the ACW.
Playing with patch 1.06 as the Union, I started to notice that the AI _ now _ seems to exhibit the suicidial behavior with large formed units, up to, and including small Corps that use to characterize those deep kamakazie Cav. raids in the 1.05 versions.
In Sept. of 1861 a lone Reb division got itself cut off south east of Cincinnati, and after weather attrition losses through Nov. was wiped out by Grants Large Division.
Now, in July 1862 Grant is about to assault Bowling Green.
However Bragg breaks through McClernad`s strong Division at Grayson Ky., on Grant`s right ( with an overwater attack that costs him little losses BTW

Bragg wins another battle at Mead Ky. against a weak Div. and then moves to assault and siege Louisville after winning a battle there. He has covered 168 real map miles, crossed 2 rivers, and fought 3 major battles in one Game turn of 2 weeks.
I guess the hard marching Reb Infantry might be able to do that.....but why would the otherwise smart AI (previous to 1.06 patch) do that unless it thinks he`s a Cav. raid..???
He`s isolated, can`t take Louisville, and I will destroy him with Shermans Division from Grant`s Corps and Porter`s Divsion from Lexington.
The tool tip indicates he has 2 divisions with him, however I wonder if it`s just his HQ sitting there, which seems to be the AI`s newest best trick, disappearing the line units in a stack after a deep advance.
It did this around Harpers Ferry with Jackson Corps in late 1861, when I cought him North East of there, there was just a HQ ?
The AI of 1.06 was supposed to be better, but it seems just more aggressive.
Playing my usual careful, slow, historical Game, without huge killer stacks, or taking advantage of AI weakness, at July 1862 the Reb losses are 41,186. Union 21,700.
Something is not right here, and I think it`s the "new' 1.06 AI..