Complex sentence: At the same time, an army commanded by Nguyen Duc Trung ambushed the Champa army and forced it to withdraw and then, this army was completely wiped out by Le Hy Cat's troops.
Split into simpler sentences: At the same time, an army commanded by Nguyen Duc Trung ambushed the Champa army and forced it to withdraw and. This army was then completely wiped out by Le Hy Cat's troops.