Complex sentence: Even though Veronica didn't intend to do anything, she and Jackie got into a fight at the school dance, and that, along with the revelation about his father, led Wallace to leave town to go live with his biological father in Chicago.
Split into simpler sentences: Even though Veronica doesn't intend to do anything, she and Jackie get into a fight at the school dance. That, along with the revelation about his father, leads Wallace to leave town to go live with his biological father in Chicago.