<P> Chancellorsville Campaign: </P> <Ul> <Li> 17,287 (1,606 killed 9,762 wounded 5,919 captured / missing): <Ul> <Li> Chancellorsville: 12,145 (1,082 killed 6,849 wounded 4,214 captured / missing); </Li> <Li> 2nd Fredericksburg / Salem Church: 4,700 (493 killed 2,710 wounded 1,497 captured / missing); </Li> <Li> Minor skirmishes: 442 (31 killed 203 wounded 208 captured / missing); </Li> </Ul> </Li> </Ul> <Li> 17,287 (1,606 killed 9,762 wounded 5,919 captured / missing): <Ul> <Li> Chancellorsville: 12,145 (1,082 killed 6,849 wounded 4,214 captured / missing); </Li> <Li> 2nd Fredericksburg / Salem Church: 4,700 (493 killed 2,710 wounded 1,497 captured / missing); </Li> <Li> Minor skirmishes: 442 (31 killed 203 wounded 208 captured / missing); </Li> </Ul> </Li> <Ul> <Li> Chancellorsville: 12,145 (1,082 killed 6,849 wounded 4,214 captured / missing); </Li> <Li> 2nd Fredericksburg / Salem Church: 4,700 (493 killed 2,710 wounded 1,497 captured / missing); </Li> <Li> Minor skirmishes: 442 (31 killed 203 wounded 208 captured / missing); </Li> </Ul>

At the battle of chancellorsville who launched a surprise attack on the union forces