Now that the dreadful march was over, the battered expedition force found itself in a somewhat better position.
The flooded clearing was effectively defending them from one side, which meant that they would not be surrounded, at least. With that, the army could assemble into a stable battle formation.
It was truly a miracle of perseverance and discipline that they had managed to maintain a semblance of order and keep themselves from being decimated by the enemy while fighting their way through the nightmarish jungle — but armies were not meant to fight battles while moving.
Finally reaching their destination, the Song Army came to a halt and spread along the edges of the flooded plain, building a proper battle line. It had two layers, so that forward units could rotate back and give way to fresh troops — then switch again after a period of rest. A field hospital was being hastily arranged behind the two layers, as well.