A convoy carrying four independent supply companies destined to arrive at Buna on 20 September was delayed: "The mechanism for maintaining supply for the South Seas Force was broken." By the time the Japanese had advanced to Ioribaiwa, there was extreme rationing and the daily rice ration had been reduced to per day without the prospect of captured stores alleviating the difficulty. Horii's force was unable to advance further. As the Japanese withdrew, it was found that many of the enemy had died of malnutrition with evidence that some Japanese had been reduced to eating wood, grass, roots and other inedible material. Australian soldiers were also confronted with evidence of cannibalism. Dead and wounded Australian and Japanese soldiers who had been left behind in the Australian retreat from Templeton's Crossing were stripped of flesh. In 1987, a Japanese documentary "Yuki Yuki te Shingun" contained interviews with Japanese soldiers who confessed to cannibalism in New Guinea. The evidence of cannibalism inflamed and angered the feelings of the Australians towards their adversaries.