Gettysburg.
The 'High Water Mark of the Confederacy' as some historians call it. Specifically, the battle of Little Round Top and Pickett's Charge I find interesting.
The latter more than the former.
I get that General Lee had attacked both flanks and forced the Union to reiforce the flanks and therefore deduced they were weak and would break in the center.
So he sends 15,000 men across a mile of open ground with a fence, stone wall, rife and cannon fire in the way. When the Yanks had good interior lines and could bring boys up in no time.
I have to agree with Longstreet that this charge was a defeated before it began.
But to be fair it is not all on Lee as he said it was. JEB Stuart was nowhere to be seen for the first two whole days of the battle I believe. Forcing his General to fight blind in enemy country.
