After returning from Mexico he transferred to the cavalry and served in Kansas, in the Utah War, and in the Indian Wars, participating in 1857 in a punitive expedition against the Cheyenne. In the summer and fall of 1860, Sedgwick commanded an expedition to establish a new fort on the Platte River in what is now Colorado. This was a remote location with no railroads, and all supplies having to be carried long distances by riverboat, wagon train or horseback.  Even though many of these supplies failed to arrive, Sedgwick still managed to erect comfortable stone buildings for his men before the cold weather set in. Sedgwick during the Civil War.At the start of the American Civil War, Sedgwick was serving as a colonel and assistant inspector general of the Military Department of Washington. He missed the early action of the war at the First Battle of Bull Run, recovering from cholera. Promoted to brigadier general on August 31, 1861, he commanded the 2nd brigade of Maj. Heintzelman's division in the Army of the Potomac, then his own division, which was designated the 2nd division of the II Corps for the Peninsula Campaign. In Virginia, he fought at Yorktown and Seven Pines. During the Seven Days Battles, Sedgwick's division fought at Savage's Station and Glendale, being wounded in the latter engagement. After the Seven Days Battles, he was promoted to major general. The II Corps and Sedgwick's division were not involved in the Northern Virginia Campaign. General Sedgwick (seated right) with Colonels Albert V. Sackett in Harrison's Landing, Virginia, during the Peninsula Campaign in 1862. In the Battle of Antietam, II Corps commander Maj. Sumner impulsively sent Sedgwick's division in a mass assault without proper reconnaissance. His division was engaged by Confederate forces under Maj. "Stonewall" Jackson from three sides, was routed, and fell back with barely half the men it had started with.
Sedgwick himself was shot three times, in the wrist, leg, and shoulder, and was out of action until after the Battle of Fredericksburg. From December 26, 1862, he briefly led the II Corps and the IX Corps, and then finally the VI Corps of the Army of the Potomac, which he commanded until his death in 1864. During the Battle of Chancellorsville, his corps faced Fredericksburg in an initial holding action while Maj.
Joseph Hooker's other four corps maneuvered against Robert E. He was slow to take action, but eventually crossed the Rappahannock River and assaulted Maj. Jubal Early's small force on Marye's Heights on May 3 during the Second Battle of Fredericksburg.
Moving west slowly to join forces with Hooker and trap Lee between the halves of the army, he was stopped by elements of Lee's Second Corps under Maj. Stuart, following the wounding of Jackson at the Battle of Salem Church, forcing his eventual retreat back over the Rappahannock. Horse artillery headquarters in Brandy Station, Virginia, February 1864. Sedgwick stands at the far right between Generals George G. Meade and Alfred Torbert, along with staff officers.
At the Battle of Gettysburg, his corps arrived late on July 2, and as a result only a few units were able to take part in the final Union counterattacks in the Wheatfield. It was not kept together as a unit during the second and third days of the battle, its brigades scattered around to plug holes in the line. While much of Sedgwick's VI Corps was held in reserve at Gettysburg, it performed exceptionally at the Second Battle of Rappahannock Station in November, capturing four field pieces, eight stands of enemy colors and 1,700 prisoners. Prior to the start of the Overland Campaign in the spring of 1864, George Meade reorganized the Army of the Potomac and dropped several underperforming generals.
Sedgwick narrowly missed the chopping block, being that he was unpopular with Secretary of War Edwin Stanton for being a vocal admirer of departed Army of the Potomac commander George McClellan and for having shown insufficient enthusiasm for abolitionism and the Radical Republican platform. Sedgwick had also made enemies among the Radical Republicans by criticizing General Benjamin Butler, one of their favorites.
Meade, realizing this, proposed reassigning Sedgwick to command in the Shenandoah Valley. Sedgwick himself acknowledged that he was war-weary by this point and would have welcomed reassignment to a post where not much fighting was expected. In a letter to his sister, he said that he could gladly leave the army without regret and wished to come home to New England. In the end however, General Franz Sigel got the Shenandoah Valley command, which ended up being a much more active theater in 1864 than anyone expected, and Sedgwick remained in command of the VI Corps.
In the Overland Campaign, the VI Corps was on the Union right at the Battle of the Wilderness and defended against assaults by Lt. Sedgwick died at the beginning of the Battle of Spotsylvania Court House, on May 9, 1864. His corps was probing skirmish lines ahead of the left flank of Confederate defenses and he was directing artillery placements. Confederate sharpshooters were about 1,000 yards (900 m) away, and their shots caused members of his staff and artillerymen to duck for cover. Sedgwick strode around in the open and was quoted as saying, What?
Men dodging this way for single bullets? What will you do when they open fire along the whole line? " Although ashamed, his men continued to flinch and he said, "Why are you dodging like this? They couldn't hit an elephant at this distance.  Reports that he never finished the sentence are apocryphal, although the line was among his last words.
 He was shot by a Whitworth rifle moments later under the left eye and mortally wounded. His chief of staff Martin T. McMahon said that the sharpshooters' bullets were flying all around, making whistling noises, and The same shrill whistle closing with a dull, heavy stroke interrupted me, and I remember distinctly that I commenced to say'General, they are firing explosive bullets.
When his face turned slowly to me, and blood spurting from his left cheek under the eye in a steady stream, brought to me the first knowledge of our great disaster. He fell in my direction and I was so close to him that my effort to support him failed, and I went to the ground with him. Corps medical personnel were immediately summoned, but Sedgwick never regained consciousness and continued to bleed out for some time, until his hair was soaked with blood. Sedgwick was the highest-ranking Union death in the Civil War.
Although Major General James B. McPherson was in command of an army at the time of his death and Sedgwick of a corps, Sedgwick had the most senior rank by date of all major generals killed. Upon hearing of his death, Lt.
Grant, flabbergasted by the news, repeatedly asked, Is he really dead? Monument to commemorate the death of General John Sedgwick at Spotsylvania National Military Park, Virginia.
Sedgwick's reputation was that of a solid, dependable, but relatively unaggressive general. He was well liked by his soldiers, who referred to him affectionately as "Uncle John".
His death was met by universal sorrow; even Robert E. Lee expressed his sadness over the fate of an old friend.
Meade wept at the news. Meade had recently quarreled with Sedgwick for being over-reliant on fellow corps commander Gouverneur Warren for advice, and said of him I wish we could have parted on better terms. Grant characterized Sedgwick as one who "was never at fault when serious work was to be done" and he told his staff that the loss for him was worse than that of an entire division.Sedgwick is buried near his birthplace of Cornwall Hollow, Connecticut. An equestrian statue honors him and the VI Corps at Gettysburg National Military Park.
A statue of General Sedgwick at West Point. There is a monument of General Sedgwick at West Point. Academy legend has it that a cadet who spins the rowels of the spurs on boots of the statue at midnight while wearing full parade dress gray over white uniform under arms will have good luck on his or her final exam. The following were named in his honor.
Fort Sedgwick was one of the forts of the Union siege line in the Siege of Petersburg 186465. Camp Rankin was renamed Fort Sedgwick in 1865, near Julesburg, Colorado. A major street in the Bronx, New York City is named after him. An eastwest street in Washington, D. Near American University, is also named in his honor, as is another on Chicago's near north side, with a CTA station named after the street.Grand Army of the Republic Post #4 in Keene, New Hampshire; Post #12 in Milwaukee, Wisconsin; Post #17 in Santa Ana, California; and Post #37 in York, Pennsylvania, are all named after him. Also, a junior high-school (John Sedgwick Middle School "Home of the Generals") in Port Orchard, Washington, was named after him. Farley, his headquarters at the time of the Battle of Brandy Station, was listed on the National Register of Historic Places in 1976. The item "Civil War CDV Union General Johns Sedgwick VI Corps Corps Badge" is in sale since Thursday, January 14, 2021. This item is in the category "Collectibles\Militaria\Civil War (1861-65)\Original Period Items\Photographs". The seller is "civil_war_photos" and is located in Midland, Michigan.
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