At the end of 1943 the 8th Brigade was moved to North Queensland and in January 1944, it was reallocated to the 5th Division and deployed to New Guinea. The 4th Battalion was the first unit from the brigade to arrive and after relieving the &lt;a href="2/17th%20Battalion%20%28Australia%29"&gt;2/17th Battalion&lt;/a&gt; at Sio it began the task of clearing the coast between there at Saidor, in order to support the 9th Division's campaign on the Huon Peninsula. In early February, they had completed this objective and were relieved by the 30th Battalion at Crossingtown. As the campaign progressed the 8th Brigade was tasked with clearing the Madang–Bagadjim area and the 4th Battalion carried out patrols between the Maclay River and Bostrem Bay. In May, the brigade went on the offensive against the Japanese forces located to the north of Alexishafen in order to support the 6th Division's campaign in the Aitape–Wewak region. In mid June, the 4th Battalion took over the advance and occupied Bogia, Potsdam and Hansa Bay. In October, following the end of hostilities, they were moved to Wewak as the demobilisation process began. The last members of the battalion departed for Australia on 24 January 1946 and the battalion was subsequently disbanded. During the war the battalion suffered 39 casualties, of which 15 were killed. Members of the battalion received the following decorations: two Military Medals and six Mentions in Despatches.