Commander Air Force's mid-rank officers' ranks are modelled on those of the Royal Navy, the term wing commander is used as a rank, and this is the equivalent of a lieutenant colonel in the army or a commander in the navy. The rank of wing commander is above that of squadron leader and below that of group captain. In the former Royal Naval Air Service, which was merged with the Royal Flying Corps to form the Royal Air Force in 1918, the pilots held appointments as well as their normal ranks in the Royal Navy, and they wore insignia appropriate to
120 Squadron Royal Netherlands Air Force thereby ending its relationship with the RAAF. No. 120 Squadron saw combat against Indonesian forces during the Indonesian National Revolution. It remained at Biak until April 1946, when it was deployed to Cililitan near Jakarta. The British-led South East Asia Command, which was responsible for the western NEI at the time, ordered that the squadron proceed to Surabaya where it relieved Royal Air Force P-47 Thunderbolts. During the second half of the year No. 120 Squadron flew 125 combat sorties, during which five of its Kittyhawks were damaged by ground fire. The British left the NEI near the end of