Weather favored the Mongols that morning .
Four Mongol fleets moved against the Song : Li Heng attacked from the north and northwest ; Zhang would proceed from the southwest ; the last two fleets attacked from the south and west .
Weather favored the Mongol that morning .
Four Mongol fleets moved against the Song : Li Heng attacked from the north and northwest ; Zhang would proceed from the southwest ; the last two fleets attacked from the south and west .