The first battle of Bull Run was fought on July 21, 1861. The Union Army suffered defeat and retreated to Washington after being out fought by the Confederate Army under the leadership of Stonewall Jackson. The “Rebel Yell” was born that day, the yell gave the confederates the advantage of the last push making the Union Army retreat.
President Lincoln is quoted as saying, “It’s damned bad.” President Lincoln then replaced General McDowell with General George B. McClellan. McClellan became known as “Little Mac” and was a great organizer shaping up the Army of the Potomac.