II Corps (ACW)

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II Corps (ACW)

There were five corps in the Union Army

Union Army

The Union Army was the army that fought for the Union during the American Civil War. It was also known as the Federal Army, the U.S....
designated as II Corps (Second Army Corps) during the American Civil War

American Civil War

The American Civil War , also known as the War Between the States and several Naming the American Civil War, was a civil war in the United States....
.

Of these five, the one most widely known was in the Army of the Potomac, the subject of this article.

II Corps was prominent by reason of its longer and continuous service, larger organization, hardest fighting, and greatest number of casualties.

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Encyclopedia

There were five corps in the Union Army

Union Army

American Civil War

The American Civil War , also known as the War Between the States and several Naming the American Civil War, was a civil war in the United States....
.

Army of the Cumberland
Army of the Cumberland

The Army of the Cumberland was one of the principal Union armies in the Western Theater of the American Civil War during the American Civil War....
, II Corps commanded by Thomas L. Crittenden (October 24, 1862 – November 5, 1862)
Army of the Mississippi
Army of the Mississippi

Army of the Mississippi was the name given to two Union Army armies that operated around the Mississippi River, both with short existences, during the American Civil War....
, commanded by William T. Sherman (January 4, 1863 – January 12, 1863)
Army of the Ohio
Army of the Ohio

The Army of the Ohio was the name of two Union Army armies in the American Civil War. The first army became the Army of the Cumberland and the second army was created in 1863....
, commanded by Thomas L. Crittenden (September 29, 1862 – October 24, 1862)
Army of Virginia
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 States Army Army of Northern Virginia, commanded by Robert E....
, commanded by Nathaniel P. Banks (June 26, 1862 – September 4, 1862) and Alpheus S. Williams
Alpheus S. Williams

Alpheus Starkey Williams was a lawyer, judge, journalist, U.S. Congressman, and a Union Army general in the American Civil War....
(September 4, 1862 – September 12, 1862)
Army of the Potomac
Army of the Potomac

The Army of the Potomac was the major Union Army in the Eastern Theater of the American Civil War of the American Civil War....
(March 13, 1862 – June 28, 1865).

Of these five, the one most widely known was in the Army of the Potomac, the subject of this article.

Corps history

The II Corps was prominent by reason of its longer and continuous service, larger organization, hardest fighting, and greatest number of casualties. Within its ranks was the regiment that sustained the largest percentage of loss in any one action; the regiment that sustained the greatest numerical loss in any one action; and the regiment that sustained the greatest numerical loss during its term of service. Of the one hundred regiments in the Union Army that lost the most men in battle, thirty-five of them belonged to the II Corps.

The corps was organized under General Orders No. 101, March 21, 1862, which assigned General Edwin V. Sumner to its command, and Generals Israel B. Richardson

Israel B. Richardson

Israel Bush Richardson was a United States Army officer during the Mexican-American War and American Civil War, where he was a Major general in the Union Army....
, John Sedgwick

John Sedgwick

John Sedgwick was a teacher, a career military officer, and a Union Army general in the American Civil War. His death at the Battle of Spotsylvania Court House is often considered a well known tale of irony....
, and Louis Blenker

Louis Blenker

Louis Blenker was a Germany and American soldier....
to the command of its divisions. Within three weeks of its organization the corps moved with George B. McClellan

George B. McClellan

George Brinton McClellan was a Major general during the American Civil War. He organized the famous Army of the Potomac and served briefly as the general-in-chief of the Union Army....
's Army of the Potomac on the Peninsula Campaign

Peninsula Campaign

The Peninsula Campaign of the American Civil War was a major Union operation launched in southeastern Virginia from March through July 1862, the first large-scale offensive in the Eastern Theater of the American Civil War....
, except for Blenker's division, which was withdrawn on March 31 from McClellan's command, and ordered to reinforce John C. Frémont

John C. Frémont

John Charles Fr?mont , was an United States military Commissioned officer, List of explorers, the first candidate of the History of United States Republican Party for the office of President of the United States, and the first presidential candidate of a major party to run on a platform in opposition to slavery....
's army in western Virginia

Virginia

The Commonwealth of Virginia is an United States U.S. state on the East Coast of the United States of the Southern United States. The state is known as the "Old Dominion" and sometimes as "Mother of Presidents", because it is the birthplace of Lists of United States Presidents by place of birth#By state....
. Blenker's division never rejoined the corps. The remaining two divisions numbered 21,500 men, of whom 18,000 were present for duty.

The first general engagement of the corps occurred at Fair Oaks

Battle of Seven Pines

The Battle of Seven Pines, also known as the Battle of Fair Oaks or Fair Oaks Station, took place on May 31 and June 1, 1862, in Henrico County, Virginia, as part of the Peninsula Campaign of the American Civil War....
, where Sumner's prompt and soldierly action brought the corps on the field in time to retrieve a serious disaster, and change a rout into a victory. The casualties of the two divisions in that battle amounted to 196 killed, 899 wounded, and 90 missing. In the Seven Days Battles

Seven Days Battles

The Seven Days Battles was a series of six major battles over the seven days from June 25 to July 1, 1862, near Richmond, Virginia during the American Civil War....
it lost 201 killed, 1,195 wounded, and 1,024 missing. Upon the withdrawal of the army from before Richmond

Richmond, Virginia

Richmond is the Capital of the Commonwealth of Virginia, in the United States. Like all Virginia municipalities incorporated as cities, it is an independent city and not part of any county....
, it moved to the support of John Pope

John Pope (military officer)

John Pope was a career United States Army officer and Union Army general in the American Civil War. He had a brief but successful career in the Western Theater of the American Civil War, but he is best known for his defeat at the Second Battle of Bull Run in the Eastern Theater of the American Civil War....
's Army of Virginia

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 States Army Army of Northern Virginia, commanded by Robert E....
at Second Bull Run, arriving on that field in time to go into position at Chantilly

Battle of Chantilly

}|-||}The Battle of Chantilly took place on September 1, 1862, in Fairfax County, Virginia, as the concluding battle of the Northern Virginia Campaign of the American Civil War....
, but was not engaged.

The corps then marched on the Maryland Campaign

Maryland Campaign

The Maryland Campaign, or the Antietam Campaign, of September 1862 is widely considered one of the major Turning Point of the American Civil War of the American Civil War....
, during which William H. French

William H. French

William Henry French was a career United States Army officer and a Union Army General officer in the American Civil War. He rose to temporarily command a corps within the Army of the Potomac, but was relieved of active field duty following poor performance during the Mine Run Campaign in late 1863....
's (3rd) Division was added. At Antietam

Battle of Antietam

The Battle of Antietam , fought on September 17, 1862, near Sharpsburg, Maryland, and Antietam Creek, as part of the Maryland Campaign, was the first major battle in the American Civil War to take place on Northern United States soil....
the corps was prominently engaged, its casualties amounting to more than double that of any other corps on the field. Out of 15,000 effectives, it lost 883 killed, 3,859 wounded, and 396 missing; total, 5,138. Nearly one-half of these casualties occurred in Sedgwick's (2nd) Division, in its bloody and ill-planned advance on the Dunker church, an affair that was under Sumner's personal direction. The Irish Brigade

Irish Brigade (US)

This article is about the unit of the United States Army during the Civil War. For other Irish Brigades, see Irish Brigade.The Irish Brigade was an infantry brigade that served in the American Civil War, consisting predominantly of Ireland immigrants....
, of Richardson's (1st) Division, also sustained a terrible loss in its fight at the "Bloody Lane", but, at the same time, inflicted a greater one on the enemy. This allowed Col. Francis C. Barlow to lead the 61st and 64th NY to break through the Confederate line.General Richardson was killed in this battle, and General Sedgwick received three wounds.

The next battle was at Fredericksburg

Battle of Fredericksburg

The Battle of Fredericksburg, fought in and around Fredericksburg, Virginia, from December 11 to December 15, 1862, between General Robert E. Lee's Confederate States Army Army of Northern Virginia and the Union Army Army of the Potomac, commanded by Major general Ambrose E....
. In the meantime Sumner had been promoted to the command of a Grand Division—II and IX

IX Corps (ACW)

IX Corps was a corps of the Union Army during the American Civil War that distinguished itself in combat in multiple theaters: the Carolinas, Virginia, Kentucky, Tennessee, and Mississippi....
Corps—and General Darius N. Couch

Darius N. Couch

Darius Nash Couch was a United States Army officer, naturalist, and a Union Army Major general in the American Civil War. Couch rose to command a corps in the Army of the Potomac, and led division in both the Eastern Theater of the American Civil War and Western Theater of the American Civil War....
, a division commander of the IV Corps

IV Corps (ACW)

There were two corps of the Union Army called IV Corps during the American Civil War. They were separate units, one serving with the Army of the Potomac and the Department of Virginia in the Eastern Theater, 1862–1863, the other with the Army of the Cumberland in the Western Theater, 1863–1865....
, was appointed to his place. General Winfield S. Hancock succeeded to the command of Richardson's (1st) Division, and General Oliver O. Howard

Oliver O. Howard

Oliver Otis Howard was a career United States Army officer and a Union Army General officer in the American Civil War. He was a corps commander noted for suffering two humiliating defeats, at Battle of Chancellorsville and Battle of Gettysburg, but he recovered from the setbacks while posted in the Western Theater of the American Civil War,...
took Sedgwick's place, the latter being absent on account of wounds. The loss of the corps at Fredericksburg exceeded that of any other in that battle, amounting to 412 killed, 3,214 wounded, and 488 missing, one-half of which fell on Hancock's Division in the unsuccessful assault on Marye's Heights. The percentage of loss in Hancock's Division was large, Caldwell's (1st) Brigade losing 46 percent killed and wounded.

After Fredericksburg, the Grand Divisions were discontinued and, General Sumner retiring on account of age and physical disabilities, General Couch remained in command. Couch led the corps at Chancellorsville

Battle of Chancellorsville

The Battle of Chancellorsville was a major battle of the American Civil War, fought near the village of Spotsylvania Courthouse, Virginia, from April 30 to May 6, 1863....
, with Hancock, John Gibbon

John Gibbon

John Gibbon was a career United States Army officer who fought in the American Civil War and the Indian Wars....
, and French as his division commanders. Sedgwick had been promoted to the command of the VI Corps

VI Corps (ACW)

The VI Corps was a corps of the Union Army during the American Civil War....
, and Howard, who had commanded Sedgwick's Division at Fredericksburg, was promoted to the command of the XI Corps

XI Corps (ACW)

The XI Corps was a corps of the Union Army during the American Civil War, best remembered for its humiliating defeats at the battles of Battle of Chancellorsville and Battle of Gettysburg in 1863....
. At Chancellorsville, the principal part of the II Corps' fighting fell on Hancock's Division, its skirmish line, under Colonel Nelson A. Miles

Nelson A. Miles

Nelson Appleton Miles was an American soldier who served in the American Civil War, Indian Wars, and the Spanish-American War.Early life...
, distinguishing itself by a successful resistance to a strong attack of the enemy, making one of the most interesting episodes in the history of that battle. During the fighting at Chancellorsville, Gibbon's (2nd) Division remained at Fredericksburg, where it supported Sedgwick's operations, but with slight loss.

Not long after Chancellorsville, General Couch was relieved at his own request, Hancock succeeding to the command of the corps, and Caldwell to that of Hancock's Division. At the start of the Gettysburg Campaign

Gettysburg Campaign

File:Meade and Lee.jpgThe Gettysburg Campaign was a series of battles fought in June and July 1863, during the American Civil War. After his victory in the Battle of Chancellorsville, Confederate States Army Full General Robert E....
, General Alexander Hays

Alexander Hays

Alexander Hays was a Union Army general in the American Civil War, killed in the Battle of the Wilderness....
' Brigade joined, and was assigned to the 3rd Division, Hays taking command of the division. At Gettysburg

Battle of Gettysburg

The Battle of Gettysburg , fought in and around the town of Gettysburg, Pennsylvania, as part of the Gettysburg Campaign, was the battle with the largest number of casualties in the American Civil War and is frequently cited as the war's Turning point of the American Civil War....
, the corps was hotly engaged in the battles of the second and third days, encountering there the hardest fighting in its experience, and winning there its grandest laurels; on the second day, in the fighting at the Wheatfield, and on the third, in the repulse of Pickett's Charge

Pickett's Charge

Pickett's Charge was an infantry assault ordered by Confederate States Army General Robert E. Lee against Major general George G. Meade's Union Army positions on Cemetery Ridge on July 3, 1863, the last day of the Battle of Gettysburg during the American Civil War....
, which was mostly directed against Hancock's position. The fighting was deadly in the extreme, the percentage of loss in the 1st Minnesota

Minnesota

Minnesota is a U.S. state in the Midwestern United States of the United States. The twelfth largest state by area in the U.S., it is the twenty-first most populous, with just over five million residents....
, Gibbon's Division, being without an equal in the records of modern warfare. The loss in the corps was 796 killed, 3,186 wounded, and 368 missing; a total of 4,350 out of less than 10,500 engaged. Gibbon's Division suffered the most, the percentage of loss in William Harrow

William Harrow

William Harrow was an Indiana lawyer and a controversial Union Army general in the American Civil War....
's (1st) Brigade being unusually severe. Hancock and Gibbon were seriously wounded, while of the brigade commanders, Samuel K. Zook

Samuel K. Zook

Samuel Kosciuszko Zook was a Union Army general during the American Civil War, killed in action during the Battle of Gettysburg....
, Edward E. Cross

Edward E. Cross

Edward Ephraim Cross was a newspaperman and an officer in the Union Army during the American Civil War....
, George L. Willard

George L. Willard

George Lamb Willard was an officer in the Union Army who commanded a New York regiment and, briefly, a brigade in the American Civil War. He lost his life leading the brigade in the II Corps at the Battle of Gettysburg....
, and Eliakim Sherrill

Eliakim Sherrill

Eliakim Sherrill was an antebellum United States Congressman from the state of New York and a brigade commander in the Union Army during the American Civil War....
were killed. The monthly return of the corps, June 30, 1863, shows an aggregate of 22,336 borne on the rolls, but shows only 13,056 "present for duty." From the latter deduct the usual proportion of non-combatants—the musicians, teamsters, cooks, servants, and stragglers—and it becomes doubtful if the corps had over 10,000 muskets in line at Gettysburg.

General Hancock's wounds necessitated an absence of several months. General William Hays

William Hays (general)

William Hays was a career officer in the United States Army, serving as a Union Army general during the American Civil War....
was placed in command of the corps immediately after the battle of Gettysburg, retaining the command until August 12, when he was relieved by General Gouverneur K. Warren

Gouverneur K. Warren

Gouverneur Kemble Warren was a civil engineer and prominent General officer in the Union Army during the American Civil War. He is best remembered for arranging the last-minute defense of Little Round Top during the Battle of Gettysburg and is often referred to as the "Hero of Little Round Top." His subsequent service as a corps commander an...
. Warren had distinguished himself at Gettysburg by his quick comprehension of the critical situation at Little Round Top

Little Round Top

Little Round Top is the smaller of two rocky hills south of Gettysburg, Pennsylvania. It was the site of an unsuccessful assault by Confederate States Army troops against the Union Army left flank on July 2, 1863, the second day of the Battle of Gettysburg....
, and by the energetic promptness with which he remedied the difficulty. He had also made a brilliant reputation in the V Corps

V Corps (ACW)

The V Corps was a unit of the Union Army Army of the Potomac during the American Civil War....
, and as the chief topographical officer of the Army of the Potomac. He was, subsequently, in command at Bristoe Station, a II Corps affair, and one which was noticeable for the dash with which officers and men fought, together with the superior ability displayed by Warren himself. He also commanded at Mine Run

Battle of Mine Run

The Battle of Mine Run, also known as Payne's Farm, or New Hope Church, or the Mine Run Campaign , was conducted in Orange County, Virginia, in the American Civil War....
and Morton's Ford, the divisions at that time being under Generals John C. Caldwell

John C. Caldwell

John Curtis Caldwell was a teacher, a Union army general in the American Civil War, and an United States diplomat....
, Alexander S. Webb

Alexander S. Webb

Alexander Stewart Webb was a career United States Army officer and a Union Army general in the American Civil War who won the Medal of Honor for gallantry at the Battle of Gettysburg....
and Alexander Hays.

Upon the reorganization of the Army of the Potomac, March 23, 1864, the III Corps

III Corps (ACW)

There were four formations in the Union Army designated as III Corps during the American Civil War.Three were short-lived:*Army of Virginia:...
was discontinued, and two of its three divisions were ordered transferred to the II Corps. Under this arrangement the II Corps was increased to 81 regiments of infantry and 10 batteries of light artillery. The units of the old II Corps were consolidated into two divisions, under Generals Francis C. Barlow

Francis C. Barlow

Francis Channing Barlow was a lawyer, politician, and Union army General officer during the American Civil War....
and John Gibbon; the two divisions of the III Corps were transferred intact, and were numbered as the 3rd and 4th, with Generals David B. Birney

David B. Birney

David Bell Birney was a businessman, lawyer, and a Union army General officer in the American Civil War....
and Gershom Mott

Gershom Mott

Gershom Mott was a United States Army officer and a General officer in the Union Army, a commander in the Eastern Theater of the American Civil War of the American Civil War....
in command. By this accession, the II Corps attained in April, 1864, an aggregate strength of 46,363, with 28,854 present for duty.

General Hancock, having partially recovered from his wounds, resumed command, and led his battle-scarred divisions across the Rapidan River

Rapidan River

The Rapidan River is the largest tributary of the Rappahannock River in North-central Virginia. The two rivers converge just west of the city of Fredericksburg, Virginia....
. In the Battle of the Wilderness

Battle of the Wilderness

The Battle of the Wilderness, fought May 5–7, 1864, was the first battle of Lieutenant general Ulysses S. Grant's 1864 Virginia Overland Campaign against General Robert E....
, the corps lost 699 killed, 3,877 wounded, and 516 missing; total, 5,092, half of this loss falling on Birney's (3rd) Division. General Alexander Hays, commanding the 2nd Brigade of Birney's Division, was among the killed.

At Spotsylvania

Battle of Spotsylvania Court House

The Battle of Spotsylvania Court House, sometimes simply referred to as the Battle of Spotsylvania, was the second major battle in Lieutenant general Ulysses S....
the II Corps again attained a glorious place in history by Hancock's brilliant and successful assault on the morning of May 12. During the fighting around Spotsylvania, Mott's (4th) Division became so depleted by casualties, and by the loss of several regiments whose term of service had expired, that it was discontinued and merged into Birney's Division, Mott retaining the command of a brigade. The casualties of the corps in the various actions around Spotsylvania, from May 8 to May 19, aggregated 894 killed, 4,947 wounded, and 801 missing; total 6,642, or over one-third of the loss in the entire Army of the Potomac, including the IX Corps. The heaviest loss occurred in Barlow's (1st) Division. Up to this time the II Corps had not lost a color nor a gun, although it had previously captured 44 stands of colors from the enemy.

After more of hard and continuous fighting at the North Anna River

Battle of North Anna

The Battle of North Anna was fought from May 23 to May 26, 1864, as part of Union Army Lieutenant General Ulysses S. Grant's Overland Campaign against Confederate States Army Gen....
, and along the Totopotomoy, the corps reached the memorable field of Cold Harbor

Battle of Cold Harbor

The Battle of Cold Harbor, the final battle of Union Army Lieutenant general Ulysses S. Grant's 1864 Overland Campaign during the American Civil War, is remembered as one of History of the United States bloodiest, most lopsided battles....
. While at Spotsylvania it had been reinforced by a brigade of heavy artillery regiments, acting as infantry, and by the brigade known as the Corcoran Legion, so that at Cold Harbor it numbered 53,831, present and absent, with 26,900 "present for duty". Its loss at Cold Harbor including eleven days in the trenches, was 494 killed, 2,442 wounded, and 574 missing; total, 3,510. Birney's Division was but slightly engaged.

In the assaults on the Petersburg

Battle of Petersburg II

The Second Battle of Petersburg, also known as the Assault on Petersburg, was the major attempt by the Union Army to take Petersburg, Virginia, before the main Confederate Army could reinforce the city....
entrenchments, June 16 – June 18, the Corps is again credited with the largest casualty list. In one of these attacks, the 1st Maine Heavy Artillery sustained the most remarkable loss of any regimental organization in any one action during the war. At this time the corps contained 85 regiments; its effective strength, however, was less than at a previous date. The corps recrossed the James River

James River (Virginia)

The James River in the U.S. state of Virginia is a long river, including its Jackson River source. It drains a Drainage basin comprising . The watershed includes about 4% open water and an area with a population of 2.5 million people ....
, and fought at Deep Bottom, July 26, and again on August 14; then, having returned to the lines around Petersburg, Barlow's and Birney's Divisions were engaged at Ream's Station

Second Battle of Ream's Station

The Second Battle of Ream's Station was fought during the Siege of Petersburg in the American Civil War on August 25, 1864, in Dinwiddie County, Virginia....
, on August 25, in which it lost a large number of men captured.

At the Battle of the Boydton Plank Road, October 27, 1864, the division commanders were Generals Thomas W. Egan and Mott, the 1st Division (Nelson A. Miles

Nelson A. Miles

Nelson Appleton Miles was an American soldier who served in the American Civil War, Indian Wars, and the Spanish-American War.Early life...
's), being retained in the trenches. In November, 1864, General Hancock was assigned to other duty, and General Andrew A. Humphreys

Andrew A. Humphreys

Andrew Atkinson Humphreys , was a career United States Army officer, civil engineer, and a Union Army General officer in the American Civil War....
, chief of staff to the Army of the Potomac, succeeded to his position. He was in command during the final campaign, the divisions being under Generals Miles, William Hays, and Mott. The corps fought its last battle at Farmville, April 7, 1865, two days before Lee's surrender. In this final action General Thomas A. Smyth, a brigadier general in Hays' (2nd) Division, was killed. Smyth was an officer with a brilliant reputation, and at one time commanded the famous Irish Brigade.

Command history

Edwin V. Sumner	March 13, 1862 – October 7, 1862
Darius N. Couch Darius N. Couch Darius Nash Couch was a United States Army officer, naturalist, and a Union Army Major general in the American Civil War. Couch rose to command a corps in the Army of the Potomac, and led division in both the Eastern Theater of the American Civil War and Western Theater of the American Civil War....	October 7, 1862 – December 26, 1862
John Sedgwick John Sedgwick John Sedgwick was a teacher, a career military officer, and a Union Army general in the American Civil War. His death at the Battle of Spotsylvania Court House is often considered a well known tale of irony....	December 26, 1862 – January 26, 1863
Oliver O. Howard Oliver O. Howard Oliver Otis Howard was a career United States Army officer and a Union Army General officer in the American Civil War. He was a corps commander noted for suffering two humiliating defeats, at Battle of Chancellorsville and Battle of Gettysburg, but he recovered from the setbacks while posted in the Western Theater of the American Civil War,...	January 26, 1863 – February 5, 1863
Darius N. Couch Darius N. Couch Darius Nash Couch was a United States Army officer, naturalist, and a Union Army Major general in the American Civil War. Couch rose to command a corps in the Army of the Potomac, and led division in both the Eastern Theater of the American Civil War and Western Theater of the American Civil War....	February 5, 1863 – May 22, 1863
Winfield S. Hancock	May 22, 1863 – July 1, 1863
John Gibbon John Gibbon John Gibbon was a career United States Army officer who fought in the American Civil War and the Indian Wars....	July 1, 1863 – July 2, 1863
Winfield S. Hancock	July 2, 1863 – July 3, 1863
William Hays William Hays (general) William Hays was a career officer in the United States Army, serving as a Union Army general during the American Civil War....	July 3, 1863 – August 16, 1863
Gouverneur K. Warren Gouverneur K. Warren Gouverneur Kemble Warren was a civil engineer and prominent General officer in the Union Army during the American Civil War. He is best remembered for arranging the last-minute defense of Little Round Top during the Battle of Gettysburg and is often referred to as the "Hero of Little Round Top." His subsequent service as a corps commander an...	August 16, 1863 – August 26, 1863
John C. Caldwell John C. Caldwell John Curtis Caldwell was a teacher, a Union army general in the American Civil War, and an United States diplomat....	August 26, 1863 – September 2, 1863
Gouverneur K. Warren Gouverneur K. Warren Gouverneur Kemble Warren was a civil engineer and prominent General officer in the Union Army during the American Civil War. He is best remembered for arranging the last-minute defense of Little Round Top during the Battle of Gettysburg and is often referred to as the "Hero of Little Round Top." His subsequent service as a corps commander an...	September 2, 1863 – October 10, 1863
John C. Caldwell John C. Caldwell John Curtis Caldwell was a teacher, a Union army general in the American Civil War, and an United States diplomat....	October 10, 1863 – October 12, 1863
Gouverneur K. Warren Gouverneur K. Warren Gouverneur Kemble Warren was a civil engineer and prominent General officer in the Union Army during the American Civil War. He is best remembered for arranging the last-minute defense of Little Round Top during the Battle of Gettysburg and is often referred to as the "Hero of Little Round Top." His subsequent service as a corps commander an...	October 12, 1863 – December 16, 1863
John C. Caldwell John C. Caldwell John Curtis Caldwell was a teacher, a Union army general in the American Civil War, and an United States diplomat....	December 16, 1863 – December 29, 1863
Gouverneur K. Warren Gouverneur K. Warren Gouverneur Kemble Warren was a civil engineer and prominent General officer in the Union Army during the American Civil War. He is best remembered for arranging the last-minute defense of Little Round Top during the Battle of Gettysburg and is often referred to as the "Hero of Little Round Top." His subsequent service as a corps commander an...	December 29, 1863 – January 9, 1864
John C. Caldwell John C. Caldwell John Curtis Caldwell was a teacher, a Union army general in the American Civil War, and an United States diplomat....	January 19, 1864 – January 15, 1864
Gouverneur K. Warren Gouverneur K. Warren Gouverneur Kemble Warren was a civil engineer and prominent General officer in the Union Army during the American Civil War. He is best remembered for arranging the last-minute defense of Little Round Top during the Battle of Gettysburg and is often referred to as the "Hero of Little Round Top." His subsequent service as a corps commander an...	January 15, 1864 – March 24, 1864
Winfield S. Hancock	March 24, 1864 – June 18, 1864
David B. Birney David B. Birney David Bell Birney was a businessman, lawyer, and a Union army General officer in the American Civil War....	June 18, 1864 – June 27, 1864
Winfield S. Hancock	June 27, 1864 – November 26, 1864
Andrew A. Humphreys Andrew A. Humphreys Andrew Atkinson Humphreys , was a career United States Army officer, civil engineer, and a Union Army General officer in the American Civil War....	November 26, 1864 – February 15, 1865
Gershom Mott Gershom Mott Gershom Mott was a United States Army officer and a General officer in the Union Army, a commander in the Eastern Theater of the American Civil War of the American Civil War....	February 15, 1865 – February 17, 1865
Nelson A. Miles Nelson A. Miles Nelson Appleton Miles was an American soldier who served in the American Civil War, Indian Wars, and the Spanish-American War.Early life...	February 17, 1865 – February 25, 1865
Andrew A. Humphreys Andrew A. Humphreys Andrew Atkinson Humphreys , was a career United States Army officer, civil engineer, and a Union Army General officer in the American Civil War....	February 25, 1865 – April 22, 1865
Francis C. Barlow Francis C. Barlow Francis Channing Barlow was a lawyer, politician, and Union army General officer during the American Civil War....	April 22, 1865 – May 5, 1865
Andrew A. Humphreys Andrew A. Humphreys Andrew Atkinson Humphreys , was a career United States Army officer, civil engineer, and a Union Army General officer in the American Civil War....	May 5, 1865 – June 9, 1865
Gershom Mott Gershom Mott Gershom Mott was a United States Army officer and a General officer in the Union Army, a commander in the Eastern Theater of the American Civil War of the American Civil War....	June 9, 1865 – June 20, 1865
Andrew A. Humphreys Andrew A. Humphreys Andrew Atkinson Humphreys , was a career United States Army officer, civil engineer, and a Union Army General officer in the American Civil War....	June 20, 1865 – June 28, 1865