who attacked first in the battle of chancellorsville
Battle of Chancellorsville 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.