Pierre Gustave Toutant Beauregard (; May 28, 1818 – February 20, 1893) was a Louisiana-born American military officer, politician, inventor, writer, civil servant, and the first prominent general of the Confederate States Army during the American Civil War. Today he is commonly referred to as P. G. T. Beauregard, but he rarely used his first name as an adult. He signed correspondence as G. T. Beauregard. Following his military career, Beauregard returned to Louisiana, where he served as a railroad executive. He became wealthy because of his role in promoting the Louisiana Lottery.