 To follow these forces up, the 9th Division's focus then shifted to the Huon Peninsula, while the 7th Division – following the capture of Kaiapit – advanced from there to Dumpu and Marawasa, to prepare for the Australian advance through the Ramu Valley and into the Finisterre Range, towards Bogadjim near Madang on the northern coast.The Japanese formation in the campaign was the Nakai Detachment, a brigade-sized formation detached from the Japanese 20th Division under Major General Masutaro Nakai.The area was defended by several battalions of the 78th Infantry Regiment, supported by the 26th Artillery Regiment and the 27th Independent Engineer Regiment.