17 January 1943

Overnight the 2/9th Battalion under Major Bill Parry-Okeden finds an undefended section of the Sanananda position, pushing through deep swamp, which the Japanese thought would have provided a natural barrier.

The Diggers attack at dawn, catching the exhausted defenders totally unaware and quickly overwhelming them. Sanananda finally falls. The Australians find only sick and wounded Japanese. Some have retreated to Girua to the east. The rest have fled, most to the west where they hope to be evacuated by sea.