why was it called bull run
Submit. Â· just now. Report Abuse. The first major battle of the Civil War was fought in Virginia, near the Manassas, Virginia railway junction, after which the battle is called (or First Bull Run, named after the flowing stream on the battlefield, if of the Union persuasion).eport Abuse. it was called bull run by the confederacy cuz the federals ran away cuz they got thier rears kicked, the federals called it manassas cuz it was fought in the vicinity of teh manassas river in virginia.