small stream in NE Va.: site of two Civil War battles (1861 & 1862) in which Union forces were defeated
Origin of Bull Runfrom 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.