Where did the first major battle of the civil war take place?

Prince William County, Virginia

Explanation:

The first major battle of the Civil War was the First Battle of Manassas, also known as the First Battle of Bull Run. The battle took place in Prince William County, Virginia, near Manassas Junction on July 21, 1861, and resulted in a Confederate victory. The armies of both sides were disorganized and lacked training. However, both were also shocked by the fierce fighting and the number of casualties.

b) the confederacy had to pay all union war expenses.