By forenoon , Li 's ships broke through the Song 's outer line , and two other Mongol squadrons destroyed the Song formation in the northwest corner .
Before midday , the Song lost three of their ships to the Mongols .
By forenoon , Li 's ships broke through the Song 's outer line , and two other Mongols squadrons destroyed the Song formation in the northwest corner .
Before midday , the Song lost three of their ships to the Mongols .