'Manassas, Va., Vicinity - Historical Military Headquarters during the U.S. Civil War' This title refers to a geographical location in Virginia, United States, specifically the vicinity of Manassas. During the U.S. Civil War, it served as the headquarters for two prominent military figures. Initially, it was the base for General Irvin McDowell, and before him, it was used by General P.G.T. Beauregard. The area is of historical significance due to the important strategic roles it played during the Civil War, particularly in the First and Second Battles of Bull Run (First and Second Manassas), which were among the first major engagements of the war. Visitors today can explore various sites associated with these battles, offering a glimpse into the military strategies and events that shaped the course of the American Civil War.