{{unreferenced, date=October 2018 The Department of the Rappahannock was a department of the

Union Army During the American Civil War, the Union Army, also known as the Federal Army and the Northern Army, referring to the United States Army, was the land force that fought to preserve the Union (American Civil War), Union of the collective U.S. st ...

in the Eastern Theater of the

American Civil War The American Civil War (April 12, 1861 – May 26, 1865; also known by other names) was a civil war in the United States. It was fought between the Union ("the North") and the Confederacy ("the South"), the latter formed by states th ...

that existed from April 4 to June 26, 1862. GeorgeMcClellanandIrwinMcDowell

On April 4, 1862, President Lincoln created the ''Department of the Rappahannock'' from the larger

Department of the Potomac The Army of the Potomac was the principal Union Army in the Eastern Theater of the American Civil War. It was created in July 1861 shortly after the First Battle of Bull Run and was disbanded in June 1865 following the surrender of the Confedera ...

, detaching the

I Corps I Corps, 1st Corps, or First Corps may refer to: France * 1st Army Corps (France) * I Cavalry Corps (Grande Armée), a cavalry unit of the Imperial French Army during the Napoleonic Wars * I Corps (Grande Armée), a unit of the Imperial French A ...

from the

Army of the Potomac The Army of the Potomac was the principal Union Army in the Eastern Theater of the American Civil War. It was created in July 1861 shortly after the First Battle of Bull Run and was disbanded in June 1865 following the surrender of the Confedera ...

to form the basis of the new department. Its territory consisted of

Virginia Virginia, officially the Commonwealth of Virginia, is a state in the Mid-Atlantic and Southeastern regions of the United States, between the Atlantic Coast and the Appalachian Mountains. The geography and climate of the Commonwealth ar ...

“east of the Blue Ridge and west of the

Potomac River The Potomac River () drains the Mid-Atlantic United States, flowing from the Potomac Highlands into Chesapeake Bay. It is long,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map. Retrieved Augus ...

, the Fredericksburg and Richmond Railroad, including the

District of Columbia ) , image_skyline = , image_caption = Clockwise from top left: the Washington Monument and Lincoln Memorial on the National Mall, United States Capitol, Logan Circle, Jefferson Memorial, White House, Adams Morgan, ...

and the country between the Potomac and the Patuxent Rivers.” The commander of the I Corps,

Irvin McDowell Irvin McDowell (October 15, 1818 – May 4, 1885) was a career American army officer. He is best known for his defeat in the First Battle of Bull Run, the first large-scale battle of the American Civil War. In 1862, he was given command o ...

, was promoted to

Major General Major general (abbreviated MG, maj. gen. and similar) is a military rank used in many countries. It is derived from the older rank of sergeant major general. The disappearance of the "sergeant" in the title explains the apparent confusion of a ...

and authorized to command the department. On June 9, 1862, the department took part in its only engagement of the war, the

Battle of Port Republic The Battle of Port Republic was fought on June 9, 1862, in Rockingham County, Virginia, as part of Confederate Army Maj. Gen. Thomas J. "Stonewall" Jackson's campaign through the Shenandoah Valley during the American Civil War. Port Republic w ...

, during Jackson's Valley Campaign. Two brigades from the division of James Shields, commanded by

Erastus B. Tyler Erastus Bernard Tyler (April 24, 1822 – January 9, 1891) was an American businessman, merchant, and soldier. He was a general in the Union Army during the American Civil War and fought in many of the early battles in the Eastern Theater before b ...

, were outnumbered and defeated by forces led by

Stonewall Jackson Thomas Jonathan "Stonewall" Jackson (January 21, 1824 – May 10, 1863) was a Confederate general during the American Civil War, considered one of the best-known Confederate commanders, after Robert E. Lee. He played a prominent role in nearl ...

. The federals lost 1,002 men, while the confederates lost 816. It was Jackson’s costliest battle of the campaign, but was both a tactical and strategic victory for the confederates as it freed Jackson’s army to reinforce

Robert E. Lee Robert Edward Lee (January 19, 1807 – October 12, 1870) was a Confederate general during the American Civil War, towards the end of which he was appointed the overall commander of the Confederate States Army. He led the Army of Nort ...

in the

Seven Days Battles The Seven Days Battles were a series of seven battles over seven days from June 25 to July 1, 1862, near Richmond, Virginia, during the American Civil War. Confederate General Robert E. Lee drove the invading Union Army of the Potomac, command ...

. On June 26, 1862, the Department of the Rappahannock was merged into the

Army of Virginia The Army of Virginia was organized as a major unit of the Union Army and operated briefly and unsuccessfully in 1862 in the American Civil War. It should not be confused with its principal opponent, the Confederate Army of ''Northern'' Virginia, ...

as the III Corps.

External links

Department of the Rappahannock
Union Army departments