 After swinging inland through the jungle, the Japanese 4th Infantry Regiment closed the perimeter's southern flank on the night of October 24.When the Japanese arrived, only Benner's 1st Battalion remained to face them because the 2d Battalion had been pulled out to reinforce the perimeter's western flank the day before.The assault, coming under cover of heavy rain and darkness, surged out of the jungle just after midnight on the 25th.