The inhabitants of the area informed the ANGAU detachment the Japanese had retreated across Seeadler Harbour to Papitalai Mission. This, therefore, became the next objective. The 5th Cavalry would attack Papitalai Plantation from the east while the 2nd Squadron, 12th Cavalry would attack Papitalai Mission. The 5th Cavalry captured Porlaka without opposition and crossed Lemondrol Creek in canvas and rubber boats. A patrol under Captain William C. Cornelius fought an estimated 50 Japanese, who ultimately withdrew. Captain Cornelius, who was credited with killing four, was severely wounded and died the next day. He was posthumously awarded the Distinguished Service Cross.