 Complete the following phrase:  Initially assigned to I Corps, in June 1862, the division was transferred to the Virginia Peninsula where it served with the V Corps of the Army of the Potomac during the Peninsula Campaign. The division then returned to its old corps which was at the time designated III Corps in the Army of Virginia during the Second Bull Run Campaign. The divisions parent formation resumed its I Corps designation just prior to the Antietam campaign when it rejoined the Army of the Potomac. The division participated in the battles of South Mountain, 