<Ul> <Li> Chancellorsville </Li> <Li> Second Fredericksburg </Li> <Li> Salem Church </Li> <Li> Stoneman's Raid </Li> </Ul> <Li> Stoneman's Raid </Li> <P> The Battle of Chancellorsville was a major battle of the American Civil War (1861--1865), and the principal engagement of the Chancellorsville Campaign . It was fought from April 30 to May 6, 1863, in Spotsylvania County, Virginia, near the village of Chancellorsville . Two related battles were fought nearby on May 3 in the vicinity of Fredericksburg . The campaign pitted Union Army Maj. Gen. Joseph Hooker's Army of the Potomac against an army less than half its size, General Robert E. Lee's Confederate Army of Northern Virginia . Chancellorsville is known as Lee's "perfect battle" because his risky decision to divide his army in the presence of a much larger enemy force resulted in a significant Confederate victory . The victory, a product of Lee's audacity and Hooker's timid decision making, was tempered by heavy casualties, including Lt. Gen. Thomas J. "Stonewall" Jackson . Jackson was hit by friendly fire, requiring his left arm to be amputated; he died of pneumonia eight days later, a loss that Lee likened to losing his right arm . Lee's difficulty in replacing his lost men has led to his great victory being regarded as a Pyrrhic one . </P> <P> The Chancellorsville Campaign began with the crossing of the Rappahannock River by the Union army on the morning of April 27, 1863 . Union cavalry under Maj. Gen. George Stoneman began a long distance raid against Lee's supply lines at about the same time . This operation was completely ineffectual . Crossing the Rapidan River via Germanna and Ely's Fords, the Federal infantry concentrated near Chancellorsville on April 30 . Combined with the Union force facing Fredericksburg, Hooker planned a double envelopment, attacking Lee from both his front and rear . </P>

Who led the union troops at the battle of chancellorsville