Complex sentence: On one occasion, Pang De shot an arrow that planted itself in Guan Yu's helm, because of this incident, Pang De was widely known among the enemy troops as General White Horse, from the white steed he often rode.
Split into simpler sentences: On one occasion, Pang De shot an arrow that planted itself in Guan Yu's helm. By this time Pang De was widely known among the enemy troops as General White Horse, from the white steed he often rode.