Simplify the following text for a Grade 7 native English-speaking person.
Original: The 4th Alabama Infantry Regiment , led by Col. Egbert J. Jones of Huntsville , distinguished itself at the Battle of Manassas\/Bull Run , the first major encounter of the American Civil War .
Simplified: The 4th Alabama Infantry Regiment , led by Col. Egbert J. Jones of Huntsville , fought at the Battle of Manassas . It was the first major battle of the American Civil War .