Take a note from Sorrel and Longstreet's slows...
Longstreet believed that Lee was committing a grave mistake by attacking the Union position instead of fighting a defensive battle. His opposition to Lee’s plans affected his conduct. Moxley Sorrel noted that on July 2, Longstreet "failed to conceal some anger" and that "there was apparent apathy in his movements. They lacked the fire and point of his usual bearing on the battlefield." Longstreet knew early on the morning of the second day that his divisions would assault the Federal lines, and he did little to prepare for the operation. When Lee settled on a specific attack plan, Longstreet marched his two divisions of 14,500 men, despite delays and a countermarch, with reasonable celerity.