Another squadron of Liberators was added to No. 82 Wing's strength in late-April 1945. The bombers attacked targets in Java in the lead-up to Operation Oboe One, the invasion of Tarakan, which commenced on 1 May. During this and the two subsequent Oboe operations, the invasions of Labuan and Balikpapan, NWA was responsible for mining operations, convoy escort, aerial reconnaissance, and attacks on Japanese bases and troops. No. 76 Wing's Catalinas mined harbours as far north as Hong Kong and the Gulf of Hainan, China. By July, NWA had been denuded of much of its offensive capability as Nos. 79 and 82 Wings had been transferred to the First Tactical Air Force in Morotai. No. 85 Wing was formed the same month under NWA's control; it comprised two Liberator squadrons but only one became operational before the end of the Pacific War.