Both Battles of Bull Run were fought during the US Civil War so the answer in the broadest sense of the question is it was fought with Americans against Americans. To narrow it down some; the armies of the United States fought against the armies from the rebellious states forming the Confederate States of America.
battle of bull run
There were two Battles of Bull Run (Manassas), one of them being the first pitched battle of the war. Both went against the Union armies - the Confederates were the victors.
the battle of bull run was fought by the river bull run
The Battle of Bull Run was fought during the Civil War - North vs. South
The First Battle Of Bull Run
what happened in the battle of the bull run
Nother name for the battle of bull run is battle of manasses
During the Civil War the battle of bull run was the second battle in the war.
If you mean Battle of Bull Run, then it is Battle of Manassas
It Was The Second Battle Of The Bull Run Territory
First Battle of Bull Run - 32-34,000 Second Battle of Bull Run - 50,000
The second battle of bull run was in August 1862