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
RAF Bomber Command Memorial year after its unveiling, the memorial was vandalised. The word 'Islam' was spray-painted on the Bomber Command Memorial and also on the Animals in War Memorial nearby. In March 2015, Les Munro, one of the last surviving members of the Dambusters Raid, intended to sell his war medals and flight logbook at auction to raise funds for the upkeep of the RAF Bomber Command Memorial. The auction was pulled after Lord Ashcroft donated £75,000 to the Royal Air Force Benevolent Fund towards the upkeep, with a further NZ$19,500 donated by the Museum of Transport and Technology in Auckland, New Zealand,