Joseph Eggleston Johnston (February 3, 1807 – March 21, 1891) was an American military officer and politician who served in the United States Army during the Mexican–American War and in the Seminole Wars. After Virginia declared secession from the United States in 1861, he entered the Confederate States Army as one of its most senior general officers during the American Civil War.
Johnston was trained as a civil engineer at the United States Military Academy at West Point, New York, graduating in the same class as Robert E. Lee. He later saw frontier service in Florida, Texas, and Kansas and by 1860 he achieved the rank of brigadier general as Quartermaster General of the U.S. Army.
Johnston's effectiveness in the American Civil War was undercut by tensions with Confederate president Jefferson Davis. Victory eluded him in most campaigns he personally commanded. He was the senior Confederate commander at the First Battle of Bull Run in July 1861, but the victory is usually credited to his subordinate, P. G. T. Beauregard. Johnston defended the Confederate capital of Richmond, Virginia, during the 1862 Peninsula Campaign, withdrawing under the pressure of George B.