"First Blood" brings two battles, both of which occured at Bull Run/Manassas, Virginia, into the Great Battles of the American Civil War game system. The First Battle of Bull Run puts the green Union army on the road south to what everyone expects to be the only battle in a short war. But Major General Irwin McDowell's larger force meets the rebel army under General Pierre Beauregard, while General Joe Johnson's more seasoned rebels troops are also about to enter the fray. The Second Bull Run has the Union army commanded by General John Pope attempting to split Lee's Army and crush Stonewall Jackson's forces before Longstreet's wing can bail him out.