Northern Name for Battle: Chancellorsville Southern Name for Battle: Chancellorsville Location of Battle: Spotsylvania County,Virginia Date of Battle: May 1-5 1863 Northern Commander: Joseph Hooker Southern Commanders: Robert E Lee Winner: Confederates Northern Troops Involved: 130,000 Southern Troops Involved: 57,352 Northern Casualties: 16,792 Southern Casualties: 12,764 Interesting Facts: The battle lasted 14 days, and was the third costliest battle of the Civil War.