If it is a stand alone battle the Confederates can't retreat of fof the board. But if it is part of a campaign the Club Rules allow for the removal of units. Although the game has the Pittsburg Landing hex on the map at coordinates (56, 31) the ACTUAL coordinates of it are at (56, 33)! If you take the hex correctly labeled on the board you will find Union transports still unloading men just south of your position. If you make it to Pittsburg Landing be sure to capture the correct hex at (56, 33). There is no protective distance for the Landing either. Your men will not rout automatically if Union reinforcements appear at the Landing if you are nearby.
Lt. Col. Blake L. Strickler
6th Bd/4th Div/IV Corps
AotM
stricklerblake@yahoo.com