This past weekend, my son and I played through a First Bull Run scenario using the Civil War Commander rule set. This rule set has continued to morph and has adopted some of the improvements contained in the Battle Cry 150th Anniversary edition.
Both players enjoyed the game, and the union squeaked out a very narrow victory. Afterward, I tweaked the order of battle just a bit, and played around a bit with the left, center, right section boundaries. Due to the nature of the battle, I am going to add a special rule. Once during the battle, each player will be allowed to re-designate his sections. At the start, the vast bulk of the Union forces are on his right flank. While the confederates start with nothing in their center section. So it makes a bit of sense to consider the northernmost section of the field the center for both sides at the start of the battle. As the action moves, at some point each side will have the bulk of their forces in the middle section, and will want to call that the center.