James Longstreet - Wikipedia

James Longstreet (January 8, 1821 – January 2, 1904) was one of the foremost Confederate generals of the American Civil War and the principal subordinate to General Robert E. Lee, who called him his "Old War Horse." He served under Lee as a corps commander for many of the famous battles fought by the Army of Northern Virginia in the Eastern Theater, and briefly with Braxton Bragg in the Army of Tennessee in the Western Theater.

After graduating from the United States Military Academy at West Point, Longstreet served in the Mexican–American War. He was wounded in the thigh at the Battle of Chapultepec, and afterward married his first wife, Louise Garland. Throughout the 1850s, he served on frontier duty in the American Southwest. In June 1861, Longstreet resigned his U.S. Army commission and joined the Confederate Army. He commanded Confederate troops during an early victory at Blackburn's Ford in July.

Longstreet's talents as a general made significant contributions to several important Confederate victories, mostly in the Eastern Theater as one of Robert E. Lee's chief subordinates in the Army of Northern Virginia. He performed poorly at Seven Pines, but played an important role in the success of the Seven Days Battles in the summer of 1862. Longstreet led a devastating counterattack that routed the Union army at Second Bull Run in August. His men held their ground in defensive roles at Antietam and Fredericksburg. Longstreet's most controversial service was at the Battle of Gettysburg in July 1863, where he openly disagreed with General Lee on the tactics to be employed and reluctantly supervised several attacks on Union forces, including the disastrous Pickett's Charge. Afterwards, Longstreet was, at his own request, sent to the Western Theater to fight under Braxton Bragg, where his troops launched a ferocious assault on the Union lines at Chickamauga, which carried the day. Afterwards, his performance in semiautonomous command during the Knoxville Campaign resulted in a Confederate defeat. Unhappy serving under Bragg, Longstreet and his men were sent back to Lee. He ably commanded troops during the Battle of the Wilderness in 1864, where he was seriously wounded by friendly fire. He later returned to the field, serving under Lee in the Siege of Petersburg and the Appomattox Campaign.

He enjoyed a successful post-war career working for the U.S. government as a diplomat, civil servant, and administrator. His conversion to the Republican Party and his cooperation with his old friend, President Ulysses S. Grant, as well as critical comments he wrote in his memoirs about General Lee's wartime performance, made him anathema to many of his former Confederate colleagues. His reputation in the South further suffered when he led African-American militia against the anti-Reconstruction White League at the Battle of Liberty Place in 1874. Authors of the Lost Cause movement focused on Longstreet's actions at Gettysburg as a primary reason for the Confederacy's loss of the war. Since the late 20th century, his reputation has undergone a slow reassessment. Many Civil War historians now consider him among the war's most gifted tactical commanders.