Short answers, pulled from the story.
The Second Battle of Bull Run began on the 28th of August 1862, and concluded with the final clash at Chantilly on the 1st of September 1862. The main fighting occurred from August 28 through the 30th of August 1862.
Major General John Pope commanded the Army of Virginia during the Second Battle of Bull Run in August 1862. Pope was relieved of command on the 12th of September 1862, after the battle resulted in a Confederate victory.
Union casualties totaled approximately 14,462 men out of 70,000 engaged troops including 1,747 killed and 8,452 wounded. An additional 4,263 soldiers were captured or missing during the engagement.
Confederate casualties reached about 7,387 men out of 55,000 engaged including 1,096 killed and 6,202 wounded. Eighty-nine Confederate soldiers were also captured or missing during the battle.
Fitz John Porter was arrested on the 25th of November 1862, and found guilty of disobedience and misconduct on the 10th of January 1863. Pope sought scapegoats for the defeat and blamed Porter for actions taken on the 29th of August 1862.