small stream in NE Va.: site of two Civil War battles (1861 & 1862) in which Union forces were defeated
Origin of Bull Run; from uncertain or unknown; perhaps
A small stream of northeast Virginia southwest of Washington, DC, near Manassas. It was the site of two important Civil War battles (July 21, 1861, and August 29–30, 1862), both Confederate victories. They are also known as the Battles of Manassas.