Now the Australians became the pursuers as the shattered invaders retraced their steps back along the Track to the beachheads where they had landed two months earlier.
One last hurdle faced the Australians along the Kokoda Track – the Japanese defences between the settlements of Oivi and Goiari. Here bitter fighting against well-developed positions again held up the advance. By 9-10 November the Australian battalions had encircled the area and the Japanese defenders were trapped. On 11 November, the Japanese finally broke and tried to make their way through the jungle to the Kumusi River. Some managed to cross in two boats while others, including General Horii himself, attempted to raft down the river to the coast. Many were drowned, including Horii, and others were shot by snipers from Papuan Infantry Battalion patrols.
On 13 November, Australian patrols reached the Kumusi where the famous Wairopi Bridge lay in ruins. The 2/5th Field Company Engineers repaired a wrecked Japanese boat and, attaching it to a block and tackle, ferried a company of the 2/33rd Battalion to the far bank, where a small bridgehead was established. Allied aircraft dropped steel rope and tools and the engineers soon rigged up two flying foxes and two small suspension bridges, made from rope and logs. By 17 November, the battalions of the 16th and 25th Brigades were across the river.
With the Australian crossing of the Kumusi River, the Battle of the Kokoda Track came to an end.
The retreat turned into a rout until the Japanese regained their beachheads at Buna, Gona and Sanananda where their comrades had prepared a network of interconnected defensive positions and from which they determined to fight to the death.