[2] Formed late in the war, the battalion ultimately played only a minor role during the Allied campaigns in New Guinea.

[6] After forming at Camp Diddy, near Nadzab, training was undertaken and in early June 1945, the battalion was allocated to the 6th Division to take part in the final stages of the Aitape–Wewak campaign.

Wewak had just been captured by the Australians, so 2 NGIB was attached to the 17th Brigade to assist in mopping up operations in the mountains south of the town,[2] arriving on 25 June.

In early July, the battalion headquarters moved to Kwimbu, and a company captured Gisanambu in a firefight that killed 10 Japanese.

In the middle of the month, several efforts were made to secure Aoniaru, although these too were checked until 24 July when Allied air attacks forced the remaining Japanese to abandon the position.

There were still large numbers of Japanese offering resistance, though, and heavy fighting took place around Miyamboara, in the final days of the war, when a 2 NGIB patrol attempted to enter the village.