Gen. Pope's headquarters during the battle of Cedar Mountain
Franz Sigel
Riverside Drive, New York City
Portrait from Appleton's Cyclopedia

I Corps, Army of Virginia; commanded by Franz Sigel (this corps had been the Mountain Department under John Frémont; it eventually became the XI Corps, Army of the Potomac)

- Army of Virginia

He commanded the I Corps in Maj. Gen. John Pope's Army of Virginia at the Second Battle of Bull Run, another Union defeat, where he was wounded in the hand.

- Franz Sigel
Gen. Pope's headquarters during the battle of Cedar Mountain

3 related topics

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XI Corps badge

XI Corps (Union Army)

Corps of the Union Army during the American Civil War, best remembered for its involvement in the battles of Chancellorsville and Gettysburg in 1863.

Corps of the Union Army during the American Civil War, best remembered for its involvement in the battles of Chancellorsville and Gettysburg in 1863.

XI Corps badge

This order of President Lincoln was included in the one constituting John Pope's Army of Virginia, which was formed from the three commands of Frémont, Nathaniel P. Banks, and Irvin McDowell.

Major General Franz Sigel thus assumed command of the corps on June 29.

Commanders of the Army of the Potomac at Culpeper, Virginia, 1863. From the left: Gouverneur K. Warren, William H. French, George G. Meade, Henry J. Hunt, Andrew A. Humphreys, George Sykes

Army of the Potomac

The principal Union Army in the Eastern Theater of the American Civil War.

The principal Union Army in the Eastern Theater of the American Civil War.

Commanders of the Army of the Potomac at Culpeper, Virginia, 1863. From the left: Gouverneur K. Warren, William H. French, George G. Meade, Henry J. Hunt, Andrew A. Humphreys, George Sykes
The Army of the Potomac – Our Outlying Picket in the Woods, 1862
Grand Review of the Army of the Potomac, drawn by Thomas Nast, Harper's Weekly, October 10, 1863
Saint Patrick's Day celebration in the Army of the Potomac, depicting a steeplechase race among the Irish Brigade, March 17, 1863, by Edwin Forbes
Scouts and guides, Army of the Potomac, Mathew Brady
Headquarters of the 5th Corps, Army of the Potomac, at the home of Col. Avery near Petersburg, Virginia, June 1864. Photograph by Mathew Brady. From the Liljenquist Family Collection of Civil War Photographs, Prints and Photographs Division, Library of Congress
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On the contrary, Pope's army consisted of different units, and was named the Army of Virginia.

Those added to the Army of the Potomac were IX Corps, XI Corps (Sigel's I Corps in the former Army of Virginia), XII Corps (Banks's II Corps from the Army of Virginia), added in 1862; and the Cavalry Corps, created in 1863.

Clockwise from top: Battle of Gettysburg

Union Captain John Tidball's artillery

Confederate prisoners

ironclad USS Atlanta (1861)

Ruins of Richmond, Virginia

Battle of Franklin

American Civil War

Civil war in the United States between the Union (states that remained loyal to the federal union, or "the North") and the Confederacy (states that voted to secede, or "the South").

Civil war in the United States between the Union (states that remained loyal to the federal union, or "the North") and the Confederacy (states that voted to secede, or "the South").

Clockwise from top: Battle of Gettysburg

Union Captain John Tidball's artillery

Confederate prisoners

ironclad USS Atlanta (1861)

Ruins of Richmond, Virginia

Battle of Franklin
Uncle Tom's Cabin by Harriet Beecher Stowe, aroused public opinion about the evils of slavery. According to legend, when Lincoln was introduced to her at the White House, his first words were, "So this is the little lady who started this Great War."
Frederick Douglass, a former slave, was a leading abolitionist
Marais des Cygnes massacre of anti-slavery Kansans, May 19, 1858
Mathew Brady, Portrait of Abraham Lincoln, 1860
The first published imprint of secession, a broadside issued by the Charleston Mercury, December 20, 1860
Jefferson Davis, President of the Confederate States of America (1861–1865)
Bombardment of the Fort by the Confederates
Rioters attacking a building during the New York anti-draft riots of 1863
Clashes on the rivers were melees of ironclads, cottonclads, gunboats and rams, complicated by naval mines and fire rafts.
Battle between the USS Monitor and USS Merrimack (1855)
General Scott's "Anaconda Plan" 1861. Tightening naval blockade, forcing rebels out of Missouri along the Mississippi River, Kentucky Unionists sit on the fence, idled cotton industry illustrated in Georgia.
Gunline of nine Union ironclads. South Atlantic Blockading Squadron off Charleston. Continuous blockade of all major ports was sustained by North's overwhelming war production.
A December 1861 cartoon in Punch magazine in London ridicules American aggressiveness in the Trent Affair. John Bull, at right, warns Uncle Sam, "You do what's right, my son, or I'll blow you out of the water."
County map of Civil War battles by theater and year
Robert E. Lee
"Stonewall" Jackson got his nickname at Bull Run.
George B. McClellan
The Battle of Antietam, the Civil War's deadliest one-day fight.
Confederate dead overrun at Marye's Heights, reoccupied next day May 4, 1863
Pickett's Charge
Ulysses S. Grant
Albert Sidney Johnston died at Shiloh
By 1863, the Union controlled large portions of the Western Theater, especially areas surrounding the Mississippi River
The Battle of Chickamauga, the highest two-day losses
Nathaniel Lyon secured St. Louis docks and arsenal, led Union forces to expel Missouri Confederate forces and government.
New Orleans captured
William Tecumseh Sherman
These dead soldiers—from Ewell's May 1864 attack at Spotsylvania—delayed Grant's advance on Richmond in the Overland Campaign.
Philip Sheridan
Map of Confederate territory losses year by year
Burying Union dead on the Antietam battlefield, 1862
Through the supervision of the Freedmen's Bureau, northern teachers traveled into the South to provide education and training for the newly freed population.
Beginning in 1961 the U.S. Post Office released commemorative stamps for five famous battles, each issued on the 100th anniversary of the respective battle.
The Battle of Fort Sumter, as depicted by Currier and Ives.

McClellan resisted General-in-Chief Halleck's orders to send reinforcements to John Pope's Union Army of Virginia, which made it easier for Lee's Confederates to defeat twice the number of combined enemy troops.

Generals George Meade and Benjamin Butler were ordered to move against Lee near Richmond, General Franz Sigel (and later Philip Sheridan) were to attack the Shenandoah Valley, General Sherman was to capture Atlanta and march to the sea (the Atlantic Ocean), Generals George Crook and William W. Averell were to operate against railroad supply lines in West Virginia, and Maj. Gen. Nathaniel P. Banks was to capture Mobile, Alabama.