ioribaiwa ridge

Battle of Ioribaiwa Ridge: Turning Point on the Kokoda Track


The Kokoda Track, a challenging hiking trail in Papua New Guinea, holds a significant place in Australian military history due to the intense battles that unfolded during the Kokoda Campaign in September 1942. Among the pivotal encounters, the Battle of Ioribaiwa Ridge stands out, marking a crucial moment in the Australian forces’ defensive efforts against the advancing Japanese.

The Kokoda Campaign Unfolds

The Kokoda Campaign, a harrowing episode of World War II, saw Australian troops engaged in fierce battles along the challenging Kokoda Track. This track, a popular trekking route today, witnessed historical events that tested the resolve and courage of both Australian and Japanese forces.

Battle of Ioribaiwa Ridge: A Strategic Location

Defensive Positioning

As the Japanese forces advanced along the Kokoda Track, the Australians strategically positioned themselves along Ioribaiwa Ridge. This defensive stance aimed to halt the Japanese advance and protect vital supply lines to Port Moresby.

Withdrawal to Imita Ridge

Amidst the challenging terrain, Brigadier Ken Eather, leading the Australians, made the critical decision to withdraw to Imita Ridge. This strategic move allowed the Australians to regroup and strengthen their defensive position.

The Battle Unfolds

Japanese Advance and Australian Resistance 11 September 1942

The Battle of Ioribaiwa Ridge commenced on 11 September 1942 when the Japanese launched a determined attack. Australian troops, comprising the 3rd Battalion and a composite battalion, valiantly defended their position, engaging in intense combat along the ridge.

Withdrawal to Imita Ridge: 16 September 1942

As the Japanese forces continued their advance, the Australians faced the tough decision to withdraw to Imita Ridge. The nightfall of 16 September 1942 marked a critical moment when Brigadier Ken Eather orchestrated the withdrawal, ensuring the safety of his troops.

Casualties and Challenges

The fighting around Ioribaiwa Ridge took a toll on both sides. Australian casualties on 16 September amounted to 49 killed and 121 wounded, highlighting the ferocity of the battle. The Australians, however, displayed remarkable resilience in the face of adversity.

Key Moments and Decisions

Brigadier Ken Eather’s Leadership

Brigadier Ken Eather played a pivotal role in the Battle of Ioribaiwa Ridge. His strategic decisions, including the withdrawal to Imita Ridge, showcased strong leadership and a commitment to preserving the Australian force on the Kokoda Track.

Composite Battalion’s Stand

The composite battalion, a mix of Australian infantry battalions, held a crucial position along the track. Their determined stand at Ioribaiwa Ridge contributed significantly to the overall defense against the advancing Japanese.

Aftermath and Legacy

Cautious Japanese Advance

Following the Battle of Ioribaiwa Ridge, the Japanese forces proceeded cautiously, allowing the Australians time to regroup. This cautious approach by the Japanese marked a turning point in the Kokoda Campaign.

Virtual Remembrance Trail

Today, trekkers on the Kokoda Track can trace the footsteps of those who fought at Ioribaiwa Ridge through the Virtual Remembrance Trail. This interactive experience provides a poignant connection to the historical events that unfolded along the track.


The Battle of Ioribaiwa Ridge, with its intense fighting and strategic decisions, played a pivotal role in shaping the outcome of the Kokoda Campaign. As trekkers embark on the challenging journey along the Kokoda Track, the echoes of the past resonate, reminding us of the courage and sacrifice of those who braved the trails during one of the most critical chapters in Australian military history.

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