Gouverneur K. Warren

Gouverneur Kemble Warren (January 8, 1830 – August 8, 1882) was an American civil engineer and Union Army general 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 and his remaining military career were ruined during the Battle of Five Forks, when he was relieved of command of the V Corps by Philip Sheridan, who claimed that Warren had moved too slowly.

At the start of the Gettysburg Campaign, as Confederate General Robert E. Lee began his invasion of Pennsylvania, Warren advised Hooker on the routes the Army should take in pursuit. On the second day of the Battle of Gettysburg, July 2, 1863, Warren initiated the defense of Little Round Top, recognizing the importance of the undefended position on the left flank of the Union Army, and directing, on his own initiative, the brigade of Col. Strong Vincent to occupy it just minutes before it was attacked. Warren suffered a minor neck wound during the Confederate assault.

At the Battle of Five Forks on April 1, 1865, Sheridan judged that the V Corps had moved too slowly into the attack, and criticised Warren fiercely for not being at the front of his columns. Warren had been held up, searching for Samuel W. Crawford’s division, which had gone astray in the woods. But overall, he had handled his corps efficiently, and their attack had carried the day at Five Forks, arguably the pivotal battle of the final days. Nevertheless, Sheridan relieved Warren of command on the spot.

Humiliated by Sheridan, Warren resigned his commission as major general of volunteers in protest on May 27, 1865, reverting to his permanent rank as major in the Corps of Engineers. He served as an engineer for 17 years, building railroads, with assignments along the Mississippi River, achieving the rank of lieutenant colonel in 1879. But the career that had shown so much promise at Gettysburg was ruined.

He urgently requested a court of inquiry to exonerate him from the stigma of Sheridan's action. Numerous requests were ignored or refused until Ulysses S. Grant retired from the presidency. President Rutherford B. Hayes ordered a court of inquiry that convened in 1879 and, after hearing testimony from dozens of witnesses over 100 days, found that Sheridan's relief of Warren had been unjustified. On November 21, 1881 President Chester Alan Arthur directed that the findings be published; no other action was taken. Unfortunately for Warren, these results were not published until after his death.
https://en.wikipedia.org/wiki/Gouverneur_K._Warren