The north.
The Army of the Potomac.
Every battle fought by the Army of Northern Virginia was against the Union army.
The Union Army of the Potomac, and the Confederate Army of Northern Virginia.
Northern Virginia
The 1862, the Battle of Antietam was fought in Maryland. The Army of Northern Virginia fought against the Army of the Potomac. It was Lee versus McClellan.
Confederates - Army of Northern Virginia (Lee/Jackson) Union - Army of the Potomac (Hooker)
The Confederate army that fought at the First Battle of Bull Run was called the Confederate Army of the Potomac. Later it was renamed to the Army of Northern Virginia.
The Union Army was the Northern army during the American Civil War. The Union Army fought and defeated the Confederate States (Southern) Army in 1865.
The Northern army was called the Army of the Potomac and was under the command of General George G. Meade.
On the Northern side - the Army of the Potomac, commanded by John Pope. On the Southern side - the Army of Northern Virginia, commanded by Robert E. Lee.
The northern front was a unit of the Russian army that was formed in August 1915. The unit fought on the Eastern Front during World War I.
It was fought in and around Fredericksburg Virginia. General Robert E. Lee's Confederate Army of Northern Virginia and the Union Army of the Potomac, commanded by Maj. Gen.Ambrose Burnside.