the Rappahannock; reverted to I Corps, Army of the Potomac) Cavalry Brigade, commanded by George Bayard The following corps were attached for operations during the Northern Virginia Campaign: III Corps, Army of the Potomac; commanded by Samuel P. Heintzelman V Corps, Army of the Potomac; commanded by Fitz John Porter IX Corps, Army of the Potomac; commanded by Jesse L. Reno Reynolds's Division, commanded by John F. Reynolds (the Pennsylvania Reserves) Major battles Battle of Cedar Mountain – Pope (Only Banks's II Corps was involved in the fighting) Second Battle of Bull Run – Pope Battle of Chantilly – Pope (although fought mostly by Army of the Potomac troops, elements of Pope's force were engaged) References Boatner, Mark M. III, The Civil War Dictionary: Revised Edition, David McKay Company, Inc., 1984, . Battles and Leaders of the Civil War External links Army Organization during the Civil War Opposing Forces at Second Bull Run Virginia, Army of Virginia in the American Civil War 1862 establishments in the United States Military units and formations established in 1862 Military units and formations disestablished in 1862