I think the South did fight gorilla warfare along the Mississippi. It nearly drove Sherman mad. There was plenty of mistakes to go around. Had Lee listened to Longstreet at Gettysburg it might have turned out different. If Pickett had disobeyed Lee's orders and marched into Gettysburg things might've turned out different. There's no use playing the guessing game because it happened the way it did. Chamberlain broke Longstreet's charge by ordering his men to fix bayonets because his men were out of ammo. Pretty gutsy. There was talent on both sides but the North won. Sherman's march to the sea was the last straw. His troupes committed atrocities beyond imagination along the way. The North did have better equipment and the industrial complex the South did not possess.

Truth is generations of good men from both sides died. It was a tragedy of epic proportions.