No. 5 Group RAF effective squadrons of Bomber Command, personified by No 617 Squadron the "Dambusters", formed from 5 Group aircrew in March 1943. Most of the group's main airfields were around Lincoln, including RAF Scampton. By the end of the war the group had grown to 15 squadrons. The group was noted for its high accuracy bombing, being involved the sinking of the "Tirpitz" in November 1944 and the shattering of the strategic Bielefeld railway viaduct in March 1945. The Group introduced new weapons operationally, including Barnes Wallis's "bouncing" and his Tallboy and Grand Slam "earthquake" bombs. The group was disbanded on 15
No. 75 Squadron RAF Air Training Scheme, and were known as "Article XV squadrons".) 75 (NZ) Sqn rejoined No. 3 Group and was based initially at RAF Feltwell, then RAF Mildenhall, RAF Newmarket and RAF Mepal in Cambridgeshire. It saw action over France, Norway, Belgium, Italy, Sweden and Germany. Its code letters of "AA" became widely recognised on both sides, The squadron operated with three flights after receiving Short Stirlings, and "C" Flight was given the code letters "JN" as there were insufficient codes for three flights of "AA". Avro Lancasters replaced the Stirlings in 1944 until August 1945 when after moving to RAF