Why was the first Battle of Bull Run significant?

• It was the first major battle and proved the war was going to be tougher than many people thought.
• It was the last major battle of the war and proved that the South would never give up.
• It was the first major battle fought in the North and proved the South could fight anywhere.
• It was a major Union victory which left the South with no chance of winning the war.

The correct answer is: It was the first major battle and proved the war was going to be tougher than many people thought.