The Battle at Chancellorsville Chancellorsville is considered to be General Robert E. Lee's greatest victory; his cunning military tactics brought a loss to the North, defeating General Joseph Hooker's army which was almost twice the size of his. Dividing his army up several times, he drove the Federal army from the battlefield and brought a great victory to the South. In the Federal Army of the Potomac, morale rose with the appointment of Joseph Hooker to command. Hooker reorganized the army and formed a cavalry corps. He wanted to strike at Lee's army while a sizable portion was detached under Longstreet in the Su