The Japanese had landed at Milne Bay on 25 August but, as the Australian position there firmed, the third battalion of Potts' 21st Brigade was released to join the fighting along the track. With this reinforcement, he determined to make a stand on Mission Ridge, running forward from Brigade Hill. In fighting from 6 to 9 September, two battalions of the brigade withdrew, narrowly avoiding encirclement while the 2/27th Battalion was feared lost until its remnants emerged from the jungle three weeks later.