- Date: April 30 to May 6, 1863.
- Location: In and around the town of Chancellorsville, Virginia.
- Campaign: Chancellorsville
- Principal Union commander(s): Major General Joseph Hooker.
- Principal Confederate commander(s): General Robert E. Lee.
- Union forces engaged: Army of the Potomac.
- Confederate forces engaged: Army of Northern Virginia.
- Number of Union soldiers engaged: Roughly 97,382
- Number of Confederate soldiers engaged: Roughly 57,352
- Estimated Union casualties: 17,197 (killed, wounded and missing/captured)
- Estimated Confederate casualties: 13,303 (killed, wounded and missing/captured).
- Result: Confederate victory.
- Many historians rate the Battle of Chancellorsville as Confederate General Robert E. Lee’s greatest military victory.
- 1,606 Union soldiers were killed at the Battle of Chancellorsville.
- 1,665 Confederate soldiers were killed at the Battle of Chancellorsville.
- On May 10, 1863, Confederate General Stonewall Jackson died from wounds he received during the Battle of Chancellorsville.
- On June 28, 1863, about seven weeks after the Battle of Chancellorsville , President Lincoln replaced Joseph Hooker with Major General George Meade as commander of the Army of the Potomac.