Complex sentence: In a rare occurrence, the Song made a successful offensive on Jin forces, and conducted a night assault using boats loaded with gunpowder arrows, thunderclap bombs, a thousand crossbowmen, fire hundred infantry, and a hundred drummers.
Split into simpler sentences: In a rare occurrence, the Song made a successful offensive on Jin forces, and conducted a night assault using boats. They were loaded with gunpowder arrows, thunderclap bombs, a thousand crossbowmen, fire hundred infantry, and a hundred drummers.