In the late September 1942 things looked grim for the Australians fighting in Papua New Guinea. The Japanese army had advanced to Ioribaiwa Ridge just 40km from Port Moresby. The Australian soldiers facing them on Imita Ridge believed they were the last line of defence of their homeland. If Port Moresby fell Australia could be taken out of the war. The Australian counterattack would begin from here. It became a war fought utterly without mercy as the Japanese retreated for the first time in the Pacific war.