In March 1945 the 2/9th Armoured Regiment embarked for Morotai in the Netherlands East Indies as part of the buildup for one of the final campaigns of the war. The regiment was attached to the 9th Division during the Borneo campaign to provide armoured support. As the 9th Division's operations would take place in a number of locations at different times, the regiment formed a number of squadron-groups which would be attached at brigade-level. The first element of the regiment to see action was 'C' Squadron, which supported the 26th Brigade during the Battle of Tarakan in May and June and taking part in the advance along the Anzac and Bourke Highways, helping to secure the airfield and the oilfields. On 10 June 1945, 'B' Squadron took part in the landing at Labuan as part of Operation Oboe Six, and supported the 24th Brigade's advance, assisting in the capture of the airfield, and various positions along the MacArthur Road. At the same time, 'A' Squadron landed on the Borneo peninsula, securing the town before being used in a defensive role due to the impenetrable terrain further inland, which was only passable on foot.