Beauregard, P. G. T. (Pierre Gustave Toutant) (1818–1893), a United States and Confederate army officer. He was a native of New Orleans and a graduate of West Point. He distinguished himself as an engineering officer in the Mexican War. Beauregard was superintendent of West Point for a few days in January, 1861, but resigned to enter Confederate service as a brigadier general.

Beauregard was sent to Charleston, South Carolina, and on April 12, 1861, gave orders to bombard Fort Sumter, the action that began the Civil War. He led the victorious Confederates at the first Battle of Bull Run. As a full general, he took over the Confederate command at Shiloh after General A. S. Johnston was killed (1862). Beauregard was then put in charge of coastal defense in Georgia and South Carolina and successfully defended Charleston against a Union attack in 1863. In June, 1864, he held Petersburg against the first Federal assault. After the war, he was a railway president, manager of the Louisiana lottery, and state adjutant general.