During the month of May, they were heavily engaged in patrolling the 3rd Division's northern flank, around the Markham River, and the area around Missim, and one patrol succeeded in reaching the mouth of the Bituang River, to the north of Salamaua.
Throughout May, they were intensely focused on securing the 3rd Division's northern perimeter, encompassing the Markham River region and the surrounding Missim area. One successful patrol reached as far as the Bituang River's mouth, situated north of Salamaua.