Culp's Hill
As the ranking general on the field, Slocum commanded the Union army for about six hours, until Meade arrived after midnight. During this time, Slocum was responsible for the supervision of the formation of the Union defensive lines. For the duration of the battle, Slocum would command the Union line from the "point of the fish hook" from Culp's Hill to the south. Slocum's XII Corps would successfully defend Culp's Hill for three days, denying a Confederate victory at this most crucial of battles. During the battle of Culp's Hill, in addition to his own XII Corps, Slocum commanded elements of the I, VI and XI Corps.