The other relocated battalion, the 1st Battalion, 5th Marine Regiment (1/5), was landed west of the Matanikau near Kokumbuna village on 27 August. They had the mission of attacking Japanese units in the area. They faced hot sun, and strong Japanese defenses. The next morning, the Marines found that the Japanese defenders had departed during the night, so the Marines returned to the Lunga perimeter by boat. Losses in this action were 20 Japanese and 3 Marines killed.