 By 22 May , although there were still a number of Japanese in the area which continued to harass and ambush their line of communications , most of the Australian objectives had been secured and <unk> up operations began . The last remaining defensive location before the <unk> was <unk> 's Ridge , where the Japanese were sheltering in tunnels . A heavy aerial and artillery bombardment devastated the position and forced them to abandon the ridge . It was subsequently occupied by a company of Australian infantry . Within a short period of time the <unk> Road was subsequently opened , providing the Australians with the means with which to bring up supplies for the next stage of the campaign , being the advance to the <unk> , <unk> , and <unk> Rivers . The final phase of the battle cost the Japanese 106 killed , while the Australians lost 13 killed and 64 wounded . 
