Clip Signature of Union Major General Alfred Pleasonton with Rank of Major General

Battles/wars:

Mexican-American War

American Civil War

Peninsula Campaign

Battle of Antietam

Battle of Chancellorsville

Battle of Fredericksburg

Gettysburg Campaign

Battle of Brandy Station

Battle of Byram's Ford

Battle of Mine Creek

Battle of Marais des Cygnes

Pleasonton's first combat in his new role was a month later in the Gettysburg Campaign. He led Union cavalry forces in the Battle of Brandy Station, the largest predominantly cavalry battle of the war. The Union cavalry essentially stumbled into J.E.B. Stuart's Confederate cavalry and the 14-hour battle was bloody but inconclusive, although Stuart was embarrassed that he had been surprised and the Union horsemen had a newfound confidence in their abilities. Subordinate officers criticized Pleasonton for not aggressively defeating Stuart at Brandy Station. Gen. Hooker had ordered Pleasonton to "disperse and destroy" the Confederate cavalry near Culpeper, Virginia, but Pleasonton claimed that he had only been ordered to make a "reconnaissance in force toward Culpeper", thus rationalizing his actions.

In the remainder of the Gettysburg Campaign up to the climactic battle, Pleasonton did not perform as a competent cavalry commander and was generally unable to inform his commander where the enemy troops were located and what their intentions were. The Army of Northern Virginia, under Gen. Robert E. Lee, was able to slip past Union forces through the Shenandoah Valley and north into Pennsylvania. During this period, he attempted to exercise political influence by promoting the nephew of a U.S. Congressman, Captain Elon J. Farnsworth, a member of his staff, directly to brigadier general. Pleasonton also promoted Captain Wesley Merritt and First Lieutenant George Armstrong Custer to brigadier general.

Pleasonton corresponded with the congressman and complained about his lack of men and horses in comparison to Jeb Stuart's; he also politicked to acquire the cavalry forces of Maj. Gen. Julius Stahel, who commanded the cavalry in the defenses of Washington. The machinations worked. Stahel was relieved of his command and his troopers were reassigned to Pleasonton. Hooker was enraged by these activities and it was probably only his own relief from command on June 28, 1863, that saved Pleasonton's career from premature termination.

In the Battle of Gettysburg, Pleasanton's new commander, Maj. Gen. George G. Meade, understood Pleasonton's reputation (and his father's) and kept him on a short leash. For the three days of the battle, Pleasonton was forced to remain with Meade at army headquarters, rather than with the Cavalry Corps headquarters nearby, and Meade exercised more direct control of the cavalry than an army commander normally would. In postwar writings, Pleasonton attempted to portray his role in the battle as being a major one, including predicting to Meade that the town of Gettysburg would be the decisive point and, after the Confederate defeat in Pickett's Charge, that he urged Meade to attack Gen. Lee and finish him off. He conveniently made these claims after Meade's death, when dispute was impossible. On the other hand, however, Pleasonton cannot be blamed for the unfortunate cavalry action on July 3, when Meade ordered the division of Brig. Gen. Judson Kilpatrick to attack the right flank of the Confederate army, which resulted in a suicidal assault against entrenched infantry and the futile death of Brig. Gen. Elon Farnsworth. After Pleasanton was removed the field, Meade was impressed with his performance from headquarters as an acting chief of staff during the battle.

He took part in the battles of Culpeper Court House and Brandy Station, Va., and in March, 1864, was transferred to the Department of the Missouri, where he was engaged in the defenses of Jefferson City, on Oct. 8.  He commanded subsequently the cavalry in pursuit of the Confederate Gen. Price, and routed him near Marais des Cygnes river on Oct. 25.