May 1-4, 1863The Union Army under Gen. Hooker is decisively defeated by Lee's much smaller forces at the Battle of Chancellorsville in Virginia as a result of Lee's brilliant and daring tactics. Confederate Gen. Stonewall Jackson is mortally wounded by his own soldiers. Hooker retreats. Union losses are 17,000 killed, wounded and missing out of 130,000. The Confederates, 13, 000 out of 60,000.