Answer:
C. The Battle of Bull Run
Step-by-step explanation:
The Battle of Bull Run (also known as the First Battle of Manassas) was the first major clash between Union and Confederate forces in the Civil War. It took place on July 21, 1861, near Manassas, Virginia. The Confederate army won the battle, which boosted their morale and caused many people in the North to realize that the war would not be easy to win.