Northern Name for Battle: Second Manassas Southern Name for Battle: Second Bull Run Location of Battle: Prince William County, Virginia Date of Battle: Aug 29-30, 1862 Northern Commander: John Pope Southern Commander: Robert E. Lee Winner: Confederates Northern Troops Involved: 63,000 Southern Troops Involved: 54,000 Northern Casualties: 14,754 Southern Casualties: 8397 Interesting Facts: One fourth of the Union troops present died in this battle.