Frustration was especially evident among highly experienced pilots, such as Australia's top-scoring ace, Group Captain Clive Caldwell, who commanded No. 1 TAF's Spitfire squadrons. This led to a series of events known as the "Morotai Mutiny" in April 1945. Officers based at Morotai in the Dutch East Indies, including Caldwell, protested the missions against what they saw as unimportant targets and tendered their resignations. Cobby was held responsible for the incident and eventually dismissed, being replaced by Air Commodore Scherger, who had recovered from his earlier injuries and who immediately set about restoring morale. He took over No. 1 TAF as Operation Oboe One, the Battle of Tarakan, was under way; the formation's airfield construction teams had been tasked with opening the runway on Tarakan Island within a week of Allied landings but extensive pre-invasion damage and adverse environmental conditions delayed this until the end of June. Poor planning on the RAAF's part was blamed on its earlier low morale and disruptions caused by the "Mutiny". No. 1 TAF then participated in Operation Oboe Six, the Battle of North Borneo, where its performance was much improved.