北バージニア方面作戦
By August 4, 1862, Paxton was made Jackson's assistant quartermaster, and fought in the Northern Virginia Campaign. Paxton was appointed assistant adjutant general (chief of staff) on Jackson's staff on August 15, and took part in the Second Battle of Bull Run on August 28–30, and then in the Maryland Campaign and the Battle of Antietam on September 17.