who fought battle of kaiapit?
Between Australian and Japanese forces
Battle of Kaiapit
 between Australian and Japanese forces
wiki:22951260
Battle of Kaiapit [SEP] Introduction
The Battle of Kaiapit was an action fought in 1943 between Australian and Japanese forces in New Guinea during the Markham and Ramu Valley – Finisterre Range campaign of World War II. Following the landings at Nadzab and at Lae, the Allies attempted to exploit their success with an advance into the upper Markham Valley, starting with Kaiapit. The Japanese intended to use Kaiapit to threaten the Allied position at Nadzab, and to create a diversion to allow the Japanese garrison at Lae time to escape. The Australian 2/6th Independent Company flew in to the Markham Valley from Port Moresby in 13 USAAF C-47 Dakotas, making a difficult landing on a rough airstrip.