This scenario is a pretty difficult challenge for the Australians. It's a race to try to get away from the Japanese and off the map. The main objective of the Japanese is to cut off the Australians.

The Japanese managed to achieve this and had strong forces between the withdrawing Aussies and the reinforcing troops. the only option for the Australians was to move into close assault and try to break through to the other side. This failed dismally. The strong Japanese morale made a big difference. In the end, the Australians managed to retreat off 3 steps, the remaining troops were still stranded and cut off.

Overall this would be a very difficult one for the Aussies to win.