(First) Manassas (Confederate)
(First) Bull Run (Union)
About 25 miles southwest of Washington the first major battle of the Civil War pits Irvin McDowell [US] against P. G. T. Beauregard [CS] and Joe Johnston [CS].
Joseph E. Johnston orders the Confederate Army of the Potomac to withdraw from Centerville/Manassas to the Rappahannock River based on reports from JEB Stuart of increased Yankee activity
Combining the Confederate Army of the Potomac with John Magruder's Army of the Peninsula and a large garrison at Norfolk, President Jefferson Davis creates the Army of Northern Virginia.
General John Pope [US] lost to General Robert E. Lee[CS]. General James Longstreet's [CS] 28,000 man assault on August 30 was the largest simultaneous assault of the war in this Confederate victory.
Battle of Sharpsburg (Confederate)
Battle of Antietam (Union)
Army of the Potomac under McClellan [US] defeats the Army of Northern Virginia under Lee [CS], resulting in the bloodiest day in American history.
Union losses:12,401 men
2,108 dead
9,540 wounded
753 missing
Confederate losses:10, 406
1,546 dead
7,752 wounded
1,108 missing
Skirmishes at Shepherdstown, Ashby's Gap, Williamsport, and Hagerstown, as Confederates under A. P. Hill covered the retreat of the Army of Northern Virginia from Sharpsburg. Lee would keep a heavy cavalry presence in the area until October.
General "Fighting Joe" Hooker's Army of the Potomac is defeated by Robert E. Lee's Army of Northern Virginia as it crosses the Rappahannock on the way to Richmond
General Robert E. Lee [CS] advances into Pennsylvania where he meets George Meade [US]. First battling north of the city, by the second day Union forces had retreated south, forming a strong line as men arrived almost continuously. On the third day, the infamous Pickett's Charge marked the end of the Confederates hope for a victory
Following Lee's retreat from Gettysburg, the Army of Northern Virginia and the Army of the Potomac establish lines with Virginia's Rappahannock River between them.
Heavy skirmishing breaks out across a wide front in Virginia as the Army of Northern Virginia and the Army of the Potomac clash between the Rappahannock and Rapidan Rivers.
The earliest dispatches referring to this army called it simply "The Alexandria Line." The first name of the army was Army of the Potomac, but this was confusing because the Union Army in this area had the same name. Assigned to the Department of Northern Virginia under Joe Johnston's command, the name changed to the Army of Northern Virginia when Jefferson Davis combined the Army of the Potomac, The Army of the Peninsula and a garrison at Norfolk under Benjamin Huger on April 12, 1862. Johnston, however, continued to refer to his command as the Army of the Potomac. It was not until Robert E. Lee assumed command that the name appeared on orders.
It was called the Army of Northern Virginia until the end of The Civil War. Today, the Army is normally referred as the Army of Northern Virginia regardless of the time period. Three men commanded this army, P. G. T. Beauregard, Joseph E. Johnston and Robert E. Lee. G. W. Smith was in command for a single day, June 1, 1862, the second day of the Battle of Fair Oaks.