Gettysburg... while my terminology might not be perfect... army, brigade, regiment whatever...
Fact is Joshua Chamberlain and the damn Yankees ran ya’ll down like the French on that day.
Lee was not feeling well physically. Stuart wasn't there on the first and second day to provide reconnaissance. The “expert” and back-stabber Longstreet deliberately tried to sabotage Lee's plans.
Also, Custer was where Lee didn't know he was - behind the Union Lines - and the attempt on the third day to break the Union Lines would have gone off like a charm had Stuart
not been delayed by Custer. Lee planned to have Pickett and his unit hit the front of the Union Lines at the same time and place that Stuart was supposed to hit them from the rear, then roll them up on the flanks. It was a good plan and would have probably worked had the luck of the draw not stopped it.
The fact is, Union generalship left a lot to be desired and Lee was a pretty crafty and able commander. The fact that it took so many years for a part of the Country with so many more men and so much more industry and total control of the seas to defeat the South indicates where the real military talents lay. And had Lee not decided to surrender at Gettysburg and save both the North and South and their civilian populations the cost of a long an uncertain guerrilla war, fighting may have gone until the 20th century.
And you can compare the way Lee treated northern civilians to the way that savage Sheridan and that other Savage Sherman treated the southern population to see who the real primitives were.
Sheridan and Sherman set the ground rules for the horrors of the Boer War, WW1, WW2 and all successive wars which involved attacks on civilian populations as a deliberate matter of policy.
By the way, I'm not a southerner.