On July 21, 1861, in the first major land battle of the Civil War,
a large Union force under General Irvin McDowell is routed by
a Confederate army under General Pierre G.T. Beauregard.
Irvin McDowell
(October 15, 1818 – May 4, 1885)
Pierre Gustave Toutant-Beauregard
(May 28, 1818 – February 20, 1893)