Offering new and definitive interpretations of the battle's place within the Atlanta campaign, Earl J. Hess describes how several Confederate regiments and brigades made a pretense of advancing but then stopped partway to the objective and took cover for the rest of the afternoon on July 20. Hess shows that morale played an unusually important role in determining the outcome at Peach Tree Creek--a soured mood among the Confederates and overwhelming confidence among the Federals spelled disaster for one side and victory for the other.