What was demonstrated by the First Battle of Bull Run?

that thw north would win
that the south was beter trained than the north
that african americans soldiers would be useful to the union army
that the war would be long

The correct answer is none of the above. The First Battle of Bull Run, which took place on July 21, 1861, during the American Civil War, demonstrated that the war would not be quick or easily won by either side. Both the Union (North) and Confederate (South) armies were inexperienced, and the battle revealed the need for better training and organization on both sides. It also revealed the importance of leadership, as Confederate General Thomas Jackson earned his nickname "Stonewall" during the battle for his steadfast defense. Additionally, it shattered the illusion held by many in the North that the war would be won easily and quickly.