In September 1942, as fighting on the Kokoda Track intensified, the regiment deployed to New Guinea along with the 25th Infantry Brigade. It was initially deployed to defend against an advance on Port Moresby until February 1943, when they moved to Dobodura; with batteries deployed to Simeni, Soputa and the Kumusi River, the regiment's main role was to support troops mopping up isolated pockets of Japanese troops left in the area following the Allied counter-offensive along the Kokoda Track, and in the aftermath of the Battle of Buna–Gona. Throughout April to September, the regiment detached several elements to support US troops as part of the Salamaua–Lae campaign, landing at Tambu Bay during the Battle of Roosevelt Ridge; during this time several troops operated 155 mm guns. The 12th Battery and part of the 56th also deployed in support of the 9th Division during the landing at Lae. After November, the regiment concentrated around Finschaffen as part of the 9th Division to support operations during the Huon Peninsula campaign; when the 4th Infantry Brigade began the advance on Sio, the 2/6th Field Regiment was switched to support them until January 1944, when the regiment handed over its equipment to the &lt;a href="2/14th%20Field%20Regiment%20%28Australia%29"&gt;2/14th Field Regiment&lt;/a&gt; and embarked for Australia.