Complex sentence: After Jackson learns the truth behind his origin, Aquaman and Jackson (now calling himself Aqualad) are ambushed by Siren and the Xebel soldiers on a California beach, where innocent citizens get caught in the crossfire.
Split into simpler sentences: After Jackson learns the truth behind his origin, Aquaman and Jackson (now calling himself Aqualad) are ambushed by Siren and the Xebel soldiers. The fight continues onto the beach where innocent citizens get caught in the crossfire.