Buell at English => English (The Britannica Concise) Of Explained:
U.S. general. Born near Marietta, Ohio, he graduated from West Point. He was appointed general of volunteers at the start of the Civil War, and helped organize the Union's Army of the Potomac. He was sent to Kentucky to succeed W. T. Sherman and to organize the Army of the Ohio. In 1862 he commanded in the Kentucky campaign against Confederate forces under B. Bragg. Following the battle at Perryville, he was removed from command for failing to pursue Confederate forces.